diff --git a/README.md b/README.md
index 5ef4424..4c76346 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# [ID Bot](https://github.com/chrisdenman/id-bot) 0.0.3
+# [ID Bot](https://github.com/chrisdenman/id-bot) 0.0.4
                                                                 
 ![An stylised image of the project's logo formed of a lower-case i cursively joining a capitalised D](res/img/id-gum-logo.png)
 
diff --git a/VERSIONS.md b/VERSIONS.md
index fb2099b..81071a8 100644
--- a/VERSIONS.md
+++ b/VERSIONS.md
@@ -5,3 +5,5 @@
 0.0.2 - `Functionality added to require the identification of emoji and custom (Discord) emoji.`
 
 0.0.3 - `Cache expiration management.`
+
+0.0.4 - `Cache expiration bug fixes and improved factory usage.`
diff --git a/package-lock.json b/package-lock.json
index 4ac1d91..e8cdc16 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@ceilingcat/id-bot",
-  "version": "0.0.3",
+  "version": "0.0.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@ceilingcat/id-bot",
-      "version": "0.0.3",
+      "version": "0.0.4",
       "license": "Unlicense",
       "dependencies": {
         "discord-api-types": "^0.37.84",
@@ -4444,10 +4444,9 @@
       "license": "ISC"
     },
     "node_modules/ws": {
-      "version": "8.17.0",
-      "resolved": "http://mini.local:8090/repository/npm/ws/-/ws-8.17.0.tgz",
-      "integrity": "sha512-uJq6108EgZMAl20KagGkzCKfMEjxmKvZHG7Tlq0Z6nOky7YF7aq4mOx6xK8TJ/i1LeK4Qus7INktacctDgY8Ow==",
-      "license": "MIT",
+      "version": "8.17.1",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.17.1.tgz",
+      "integrity": "sha512-6XQFvXTkbfUOZOKKILFG1PDK2NDQs4azKQl26T0YS5CxqWLgXajbPZ+h4gZekJyRqFU8pvnbAbbs/3TgRPy+GQ==",
       "engines": {
         "node": ">=10.0.0"
       },
diff --git a/package.json b/package.json
index 9a4e12a..17ab6f7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ceilingcat/id-bot",
-  "version": "0.0.3",
+  "version": "0.0.4",
   "description": "A discord bot to remind users to tag uploaded images with identifiers.",
   "scripts": {
     "lint": "eslint \"src/*/*.js\"",
diff --git a/src/__tests__/cache.spec.js b/src/__tests__/cache.spec.js
index c34ab9b..8144b81 100644
--- a/src/__tests__/cache.spec.js
+++ b/src/__tests__/cache.spec.js
@@ -51,7 +51,7 @@ describe("Tests for our Cache", () => {
     });
 
     it("Newly added cache entries have a 'createdAt' value greater or equal than that sampled before population.", () => {
-        const then = factory.utcTimeStampNow;
+        const then = factory.getNowInMilliSeconds;
 
         const meta = setK0V0().getMeta(k0);
 
@@ -64,7 +64,7 @@ describe("Tests for our Cache", () => {
 
         expect(metaBefore.lastAccessedAt).toEqual(metaBefore.createdAt);
 
-        const then = factory.utcTimeStampNow;
+        const then = factory.getNowInMilliSeconds;
         cache.get(k0);
         const metaAfter = cache.getMeta(k0);
 
@@ -78,7 +78,7 @@ describe("Tests for our Cache", () => {
 
         expect(metaBefore.lastUpdatedAt).toBeUndefined();
 
-        const then = factory.utcTimeStampNow;
+        const then = factory.getNowInMilliSeconds;
         cache.set(k0, newValue);
         const metaAfter = cache.getMeta(k0);
 
diff --git a/src/js/cache-max-stale-manager.js b/src/js/cache-max-stale-manager.js
index 7547c28..691f5a7 100644
--- a/src/js/cache-max-stale-manager.js
+++ b/src/js/cache-max-stale-manager.js
@@ -63,14 +63,12 @@ class CacheMaxStaleManager {
     }
 
     #expireStaleCacheEntries() {
-        const NOW = this.#factory.utcTimeStampNow;
-
+        const NOW = this.#factory.getNowInMilliSeconds;
         [...this.#cache.metaData]
-            .filter(it => it.lastAccessedAt + this.#maxStaleLifetimeMilliSeconds > NOW)
-            .map(it => it.key)
+            .filter(it => NOW - it.lastAccessedAt > this.#maxStaleLifetimeMilliSeconds)
             .map(it => {
-                this.#cache.remove(it);
-                this.#logger.debug(`Expired key @ ${NOW}`);
+                this.#cache.remove(it.key);
+                this.#logger.debug(`Expired key ${it.key}`);
             });
     }
 
diff --git a/src/js/cache.js b/src/js/cache.js
index 36641f8..4e07572 100644
--- a/src/js/cache.js
+++ b/src/js/cache.js
@@ -45,7 +45,7 @@ class Cache {
             const value = this.#keyToValue.get(key);
 
             this.#keyToMetaData.set(key, this.#factory.withCacheAccess(this.#keyToMetaData.get(key)));
-            this.#logger.debug(`<[${key}]`);
+            this.#logger.debug(`<[${key}=${value}]`);
 
             return value;
         } else {
diff --git a/src/js/discord-interface.js b/src/js/discord-interface.js
index 5f4196c..87a0aa1 100644
--- a/src/js/discord-interface.js
+++ b/src/js/discord-interface.js
@@ -98,17 +98,13 @@ class DiscordInterface {
     /**
      * @param {IdBotMessage} received
      * @param {string} content
+     * @return Promise<Message>
      */
-    replyTo(received, content) {
+    async replyTo(received, content) {
         this._logger.debug(`sending reply to ${received.id} with "${content}"`);
-        received.reply(content);
-    }
-
-    update = (message, content) => message
-        .edit(content)
-        .then(updatedMessage => this._logger.log(`Updated ${message.id} to "${updatedMessage.content}"`))
-        .catch(e => this._logger.error(`could not delete reply with id=${message.id}`, e));
 
+        return received.discordJsMessage.reply(content);
+    }
 
     /**
      * @param {Channel} channel
@@ -116,7 +112,8 @@ class DiscordInterface {
      */
     deleteMessage(channel, messageId) {
         this._logger.debug(`attempting to delete replies to message with id=${messageId}`);
-        channel
+
+        return channel
             .messages
             .delete(messageId)
             .then(() => this._logger.debug(`deleted reply with id=${messageId}`))
diff --git a/src/js/factory.js b/src/js/factory.js
index 5646108..b738aef 100644
--- a/src/js/factory.js
+++ b/src/js/factory.js
@@ -9,6 +9,8 @@ import {GatewayIntentBits} from "discord-api-types/v10";
 import {DiscordInterface} from "./discord-interface.js";
 import {Application} from "./application.js";
 import {CacheMaxStaleManager} from "./cache-max-stale-manager.js";
+import {numberOfEmojiContained} from "./emoji.js";
+import {isImageMediaType} from "./media-type.js";
 
 const CLIENT_OPTIONS = {
     intents: [
@@ -20,6 +22,16 @@ const CLIENT_OPTIONS = {
 
 class Factory {
 
+    /**
+     * @type RegExp
+     */
+    #MESSAGE_ID_REGEXP = /(?<=(^|\s|\W)ID:\s*)(\w+)(?!\WID:)/svg;
+
+    /**
+     * @type RegExp
+     */
+    #CUSTOM_EMOJI_REGEX = /<(a)?:(?<name>\w+):(?<id>\d+)>/g;
+
     static get #CLIENT_OPTIONS() {
         return CLIENT_OPTIONS;
     }
@@ -33,7 +45,8 @@ class Factory {
      */
     createCacheExpirator(cache, tickIntervalDurationMilliSeconds = 100, maxStaleLifetimeMilliSeconds = undefined) {
         return new CacheMaxStaleManager(
-            cache, this.createLogger("MaxStaleCacheManager"),
+            cache,
+            this.createLogger("MaxStaleCacheManager"),
             this,
             tickIntervalDurationMilliSeconds,
             maxStaleLifetimeMilliSeconds
@@ -96,8 +109,8 @@ class Factory {
      *
      * @returns {number}
      */
-    get utcTimeStampNow() {
-        return new Date().getUTCMilliseconds();
+    get getNowInMilliSeconds() {
+        return Date.now();
     }
 
     /**
@@ -105,7 +118,28 @@ class Factory {
      * @param discordJsMessage
      * @returns {IdBotMessage}
      */
-    createIdBotMessage = discordJsMessage => new IdBotMessage(this, discordJsMessage);
+    createIdBotMessage = discordJsMessage => {
+        const content = discordJsMessage.content;
+
+        const contentCustomEmojiMatches = [...content.matchAll(this.#CUSTOM_EMOJI_REGEX)];
+
+        const contentStrippedOfCustomEmoji = content.replaceAll(this.#CUSTOM_EMOJI_REGEX, "");
+        const numberOfEmoji = numberOfEmojiContained(contentStrippedOfCustomEmoji);
+
+        const idMatches = [...content.matchAll(this.#MESSAGE_ID_REGEXP)];
+
+        const imageIdStats = this.createImageIdStats(
+            [...discordJsMessage.attachments.values()]
+                .map(v => v.contentType)
+                .filter(isImageMediaType)
+                .length,
+            numberOfEmoji,
+            contentCustomEmojiMatches.length,
+            idMatches.length
+        );
+
+        return new IdBotMessage(imageIdStats, discordJsMessage);
+    };
 
     /**
      * @param {string} [prefix]
@@ -119,15 +153,15 @@ class Factory {
      * @returns {CacheMeta}
      */
     createCacheMeta = key => {
-        const now = this.utcTimeStampNow;
-        
+        const now = this.getNowInMilliSeconds;
+
         return new CacheMeta(key, now, now);
     };
-    
+
     withCacheAccess = cacheMeta => new CacheMeta(
         cacheMeta.key,
         cacheMeta.createdAt,
-        this.utcTimeStampNow,
+        this.getNowInMilliSeconds,
         cacheMeta.lastUpdatedAt
     );
 
@@ -135,7 +169,7 @@ class Factory {
         cacheMeta.key,
         cacheMeta.createdAt,
         cacheMeta.lastAccessedAt,
-        this.utcTimeStampNow
+        this.getNowInMilliSeconds
     );
 
     /**
diff --git a/src/js/id-bot-message.js b/src/js/id-bot-message.js
index e93bfbd..f669e9f 100644
--- a/src/js/id-bot-message.js
+++ b/src/js/id-bot-message.js
@@ -1,6 +1,3 @@
-import {isImageMediaType} from "./media-type.js";
-import {numberOfEmojiContained} from "./emoji.js";
-
 /**
  * @typedef {typeof import('./image-id-stats.js')['ImageIdStats']} ImageIdStats
  * @typedef {typeof import('discord.js')['Snowflake']} Snowflake
@@ -17,21 +14,16 @@ class IdBotMessage {
      */
     #imageIdStats;
 
-    /**
-     * @type RegExp
-     */
-    #MESSAGE_ID_REGEXP = /(?<=(^|\s|\W)ID:\s*)(\w+)(?!\WID:)/svg;
-
-    /**
-     * @type RegExp
-     */
-    #CUSTOM_EMOJI_REGEX = /<(a)?:(?<name>\w+):(?<id>\d+)>/g;
 
     /**
      * @type Message
      */
     #discordJsMessage;
 
+    get discordJsMessage() {
+        return this.#discordJsMessage;
+    }
+
     get id() {
         return this.#discordJsMessage.id;
     }
@@ -49,12 +41,6 @@ class IdBotMessage {
         return this.#discordJsMessage.content;
     }
 
-    /**
-     * @param {string} content
-     */
-    reply(content) {
-        return this.#discordJsMessage.reply(content);
-    }
 
     /**
      * @param {Snowflake} authorId
@@ -107,29 +93,12 @@ class IdBotMessage {
     }
 
     /**
-     * @param {Factory} factory
+     * @param {ImageIdStats} imageIdStats
      * @param {Message} discordJsMessage the discord.js sourced discordJsMessage
      */
-    constructor(factory, discordJsMessage) {
+    constructor(imageIdStats, discordJsMessage) {
         this.#discordJsMessage = discordJsMessage;
-
-        const content = discordJsMessage.content;
-        const contentCustomEmojiMatches = [...content.matchAll(this.#CUSTOM_EMOJI_REGEX)];
-
-        const contentStrippedOfCustomEmoji = content.replaceAll(this.#CUSTOM_EMOJI_REGEX, "");
-        const numberOfEmoji = numberOfEmojiContained(contentStrippedOfCustomEmoji);
-
-        const idMatches = [...content.matchAll(this.#MESSAGE_ID_REGEXP)];
-
-        this.#imageIdStats = factory.createImageIdStats(
-            [...discordJsMessage.attachments.values()]
-                .map(v => v.contentType)
-                .filter(isImageMediaType)
-                .length,
-            numberOfEmoji,
-            contentCustomEmojiMatches.length,
-            idMatches.length
-        );
+        this.#imageIdStats = imageIdStats;
     }
 }
 
diff --git a/src/js/id-bot.js b/src/js/id-bot.js
index cf19aa5..7310140 100644
--- a/src/js/id-bot.js
+++ b/src/js/id-bot.js
@@ -42,7 +42,7 @@ class IdBot {
      * @param {Channel} channel
      * @param messageId
      */
-    #deleteChannelMessage(channel, messageId) {
+    async #deleteChannelMessage(channel, messageId) {
         this.#logger.debug(`deleting channel message with id=${messageId}`);
         this.#discordInterface.deleteMessage(channel, messageId);
     }
@@ -53,11 +53,15 @@ class IdBot {
     #deleteOurReplyTo(message) {
         const messageId = message.id;
         this.#logger.info(`deleting our reply to ${message.toIdString()}`);
+
         const replyId = this.#cache.get(messageId);
         if (replyId) {
-            this.#deleteChannelMessage(message.channel, replyId);
-            this.#cache.remove(messageId);
-            this.#logger.debug(this.#cache);
+            this
+                .#deleteChannelMessage(message.channel, replyId)
+                .then(() => {
+                    this.#cache.remove(messageId);
+                    this.#logger.debug(this.#cache);
+                });
         } else {
             this.#logger.warn(`${message.toIdString()} has no known replies`);
         }
@@ -74,17 +78,16 @@ class IdBot {
      *  1. if it is human authored and incorrectly identified, we post a reminder reply message
      *  2. else, if it's a self-authored reply, we cache: m.referencedMessageId -> m.id
      *
-     * Can we store arbitrary data in a message?
-     *
      * @param {IdBotMessage} message
      *
-     * @returns {Promise<void>}
+     * @returns {Promise<undefined>}
      */
     #onMessageCreate = async message => {
         this.#logger.debug(`new ${message}`);
 
         if (message.isAuthorHuman) {
             const imageIdStats = message.imageIdStats;
+
             if (!imageIdStats.isCorrectlyIdentified) {
                 const reminderMessage = this.#reminderMessage(imageIdStats);
                 this.#logger.debug(
@@ -116,9 +119,9 @@ class IdBot {
             const imageIdStats = updatedMessage.imageIdStats;
 
             if (!imageIdStats.isCorrectlyIdentified) {
+                this.#deleteOurReplyTo(updatedMessage);
                 const replyMessageContent = this.#reminderMessage(imageIdStats);
                 this.#logger.debug(`${updatedMessage.toIdString()} not correctly identified, replying with "${replyMessageContent}"`);
-                this.#deleteOurReplyTo(updatedMessage);
                 this.#discordInterface.replyTo(updatedMessage, replyMessageContent);
             } else {
                 this.#deleteOurReplyTo(updatedMessage);
@@ -133,7 +136,7 @@ class IdBot {
     #onMessageDelete = async message => {
         this.#logger.debug(`deleted id=${message.toIdString()}`);
         if (message.isAuthorHuman) {
-            this.#logger.debug(`onMessageDelete: message author is human`);
+            this.#logger.debug(`deleted message's author is human`);
             this.#deleteOurReplyTo(message);
         }
     };
diff --git a/src/js/logger.js b/src/js/logger.js
index c602e61..d9f0e05 100644
--- a/src/js/logger.js
+++ b/src/js/logger.js
@@ -16,7 +16,8 @@ class Logger {
         this.#prefix = prefix;
     }
 
-    #format = (message, level) => `${level ? (level + ":") : ":"}${this.#prefix ? (this.#prefix + ":") : ":"}${message}`;
+    #format = (message, level) => `${level ? (level + ":") : ":"}
+        ${this.#prefix ? (this.#prefix + ":") : ":"}${message}`;
 
     /**
      * @param {*} message
@@ -47,7 +48,7 @@ class Logger {
     /**
      * @param {*} message
      */
-    warn = message => this.#console.warn(this.#format(message, "WARN"));
+    warn = message => this.#console.warn(this.#format(message));
 }
 
 export {Logger};