Hi! I understand your NYC Compost app is showing a message that Bluetooth is off even though you have it turned on. Let’s get to the bottom of this together.

First, just to clarify:
1. Have you confirmed that Bluetooth is definitely on in your iPhone's Control Center or Settings?
2. Is the NYC Compost app currently open and active on your screen while you're trying to connect? The app requires Bluetooth to be active while the app is in the foreground.

Assuming Bluetooth is on and the app is active, here’s a step-by-step guide to try to fix this:

1. Restart Bluetooth and the App
- Turn Bluetooth off in Settings, wait a few seconds, then turn it back on.
- Fully close the NYC Compost app (swipe it away from your app switcher) and then reopen it.

2. Check Bluetooth Permissions
- Go to Settings > Privacy & Security > Bluetooth and make sure the NYC Compost app has permission to use Bluetooth.

3. Restart Your iPhone
- Sometimes restarting your phone refreshes the Bluetooth modules and helps apps detect Bluetooth correctly.

4. Update the App
- Ensure your NYC Compost app is updated to the latest version from the App Store. Sometimes bugs related to Bluetooth detection get fixed in updates2 10.

5. Reinstall the App
- If issues persist, try deleting the app and reinstalling it. This resets app permissions and settings that might be causing Bluetooth detection problems.

6. Keep the App Active on Screen
- The app only operates Bluetooth while open in the foreground and in receive-only mode unless you tap the ‘Unlock Bin’ button. Make sure you are interacting with the app while near the compost bin3.

If after that, it still says Bluetooth is off even while Bluetooth is on, it might be a deeper compatibility or software issue. Let me know if you see any error messages, or if any step gave you trouble.

Are you currently near the bin when receiving the message, or does it happen regardless of proximity? That detail can help me further refine the fix for you.