diff --git a/js/mobile/package.json b/js/mobile/package.json
index ebe23a4..77912fb 100644
--- a/js/mobile/package.json
+++ b/js/mobile/package.json
@@ -10,7 +10,8 @@
     "android": "expo run:android",
     "compile": "tsc --noEmit",
     "lint": "expo lint",
-    "format": "prettier --write \"src/**/*.{ts,tsx,js,jsx,json,css,md}\""
+    "format": "prettier --write \"src/**/*.{ts,tsx,js,jsx,json,css,md}\"",
+    "format:check": "prettier --check \"src/**/*.{ts,tsx,js,jsx,json,css,md}\""
   },
   "packageManager": "yarn@1.22.22",
   "dependencies": {
diff --git a/js/mobile/src/features/stream-view/MediaParticleView.tsx b/js/mobile/src/features/stream-view/MediaParticleView.tsx
index 0b043c2..cf19a15 100644
--- a/js/mobile/src/features/stream-view/MediaParticleView.tsx
+++ b/js/mobile/src/features/stream-view/MediaParticleView.tsx
@@ -112,8 +112,6 @@ function PlayableMediaView({
       });
     return () => {
       cancelled = true;
-      // Reset on teardown so the next object starts from a clean slate while
-      // its signed URL resolves, rather than flashing the previous video.
       setSourceUri(null);
       setResolveError(null);
       setCurrentTime(0);
diff --git a/js/mobile/src/hooks/use-channel.ts b/js/mobile/src/hooks/use-channel.ts
index f78bc78..f299a8b 100644
--- a/js/mobile/src/hooks/use-channel.ts
+++ b/js/mobile/src/hooks/use-channel.ts
@@ -65,7 +65,6 @@ export function useChannel(channelId: string | null): UseChannelResult {
       client.off(channelId, 'leave', onLeave);
       client.off(channelId, 'message', onMessage);
       client.unsubscribe(channelId);
-      // Clear on teardown so a new channel doesn't briefly show stale data.
       setPresence([]);
       setMessages([]);
     };
diff --git a/js/mobile/src/hooks/use-particle.ts b/js/mobile/src/hooks/use-particle.ts
index 0428e7b..27e046a 100644
--- a/js/mobile/src/hooks/use-particle.ts
+++ b/js/mobile/src/hooks/use-particle.ts
@@ -43,7 +43,6 @@ export function useLiveParticle(path: ParticlePath): UseLiveParticleResult {
 
     return () => {
       unsubscribe();
-      // Reset on teardown so a new path doesn't flash the previous particle.
       setIsLoading(true);
       setError(null);
       setParticle(null);
@@ -112,7 +111,6 @@ export function useLiveParticleChildren(
 
     return () => {
       unsubscribe();
-      // Reset on teardown so a new path doesn't flash the previous children.
       setChildren([]);
       setError(null);
       setIsLoading(true);
@@ -157,7 +155,6 @@ export function useLiveLatestChild(
 
     return () => {
       unsubscribe();
-      // Reset on teardown so a new path doesn't flash the previous child.
       setIsLoading(true);
       setLatestChild(null);
     };