diff --git a/mautrix_line/commands/auth.py b/mautrix_line/commands/auth.py
index 6f2d0ab..d669256 100644
--- a/mautrix_line/commands/auth.py
+++ b/mautrix_line/commands/auth.py
@@ -73,7 +73,8 @@ async def login_do(evt: CommandEvent, gen: AsyncGenerator[Tuple[str, str], None]
                 qr_event_id = await evt.az.intent.send_message(evt.room_id, content)
         elif item[0] == "pin":
             pin = item[1]
-            content = TextMessageEventContent(body=pin, msgtype=MessageType.NOTICE)
+            message = f"Enter this PIN in LINE on your primary device:\n{pin}"
+            content = TextMessageEventContent(body=message, msgtype=MessageType.NOTICE)
             if pin_event_id:
                 content.set_edit(pin_event_id)
                 await evt.az.intent.send_message(evt.room_id, content)
diff --git a/puppet/src/client.js b/puppet/src/client.js
index 42081ef..1b99851 100644
--- a/puppet/src/client.js
+++ b/puppet/src/client.js
@@ -108,7 +108,7 @@ export default class Client {
 	}
 
 	sendQRCode(url) {
-		this.log("Sending QR", url, "to client")
+		this.log(`Sending QR ${url} to client`)
 		return this._write({
 			id: --this.notificationID,
 			command: "qr",
@@ -126,7 +126,7 @@ export default class Client {
 	}
 
 	sendFailure(reason) {
-		this.log(`Sending failure "${reason}" to client`)
+		this.log(`Sending failure to client${reason ? `: "${reason}"` : ""}`)
 		return this._write({
 			id: --this.notificationID,
 			command: "failure",
diff --git a/puppet/src/contentscript.js b/puppet/src/contentscript.js
index 94cb394..35fc249 100644
--- a/puppet/src/contentscript.js
+++ b/puppet/src/contentscript.js
@@ -227,6 +227,7 @@ class MautrixController {
 	 */
 	parseParticipantList(element) {
 		// TODO Slice to exclude first member, which is always yourself (right?)
+		// TODO Only slice if double-puppeting is enabled!
 		//return Array.from(element.children).slice(1).map(child => {
 		return Array.from(element.children).map(child => {
 			return {
@@ -444,7 +445,7 @@ class MautrixController {
 			for (const change of changes) {
 				for (const node of change.addedNodes) {
 					const emailArea = node.querySelector("#login_email_area")
-					if (emailArea && !emailArea.getAttribute("class").includes("MdNonDisp")) {
+					if (emailArea && !emailArea.classList.contains("MdNonDisp")) {
 						window.__mautrixSendEmailCredentials()
 						return
 					}
@@ -496,7 +497,7 @@ class MautrixController {
 		}
 		const button = element.querySelector("dialog button")
 		this.expiryObserver = new MutationObserver(changes => {
-			if (changes.length == 1 && !changes[0].target.getAttribute("class").includes("MdNonDisp")) {
+			if (changes.length == 1 && !changes[0].target.classList.contains("MdNonDisp")) {
 				window.__mautrixExpiry(button)
 			}
 		})
diff --git a/puppet/src/puppet.js b/puppet/src/puppet.js
index 7890452..af87543 100644
--- a/puppet/src/puppet.js
+++ b/puppet/src/puppet.js
@@ -434,6 +434,11 @@ export default class MessagesPuppeteer {
 		let participants
         const participantList = await chatDetailArea.$("ul.mdRGT13Ul")
 		if (participantList) {
+			// TODO Use "id" syntax to tell if this is a chat/room/group, not selectors:
+			// 		c: group
+			// 		r: room
+			// 		u: chat
+			// 		It's defined by the LINE API!
 			if (await chatDetailArea.$("#leaveGroup")) {
 				this.log("Found group")
 				// This is a *group* (like a Matrix room)
@@ -461,7 +466,6 @@ export default class MessagesPuppeteer {
 			// TODO Or just look up the member ID in the contact list?
 		}
 
-		this.log(`Found participants: ${participants}`)
 		return {
 				participants,
 				...await this.page.$eval(this._listItemSelector(id),
@@ -575,7 +579,7 @@ export default class MessagesPuppeteer {
 
 	_receivePIN(pin) {
 		if (this.client) {
-			this.client.sendPIN(`Your PIN is: ${pin}`).catch(err =>
+			this.client.sendPIN(pin).catch(err =>
 				this.error("Failed to send new PIN to client:", err))
 		} else {
 			this.log("No client connected, not sending new PIN")