How to troubleshoot IFTTT applets that stopped working with smart home devices

This gives you an editorial cluster for IFTTT even before adding device-IFTTT problem pages.

1. Confirm the source service still sees the device correctly.
2. Check whether the trigger fires at all in activity history.
3. Refresh linked accounts and permissions.
4. Test with a simple applet before restoring a complex one.
5. Document rate limits or cloud delays if observed.

Useful as a supporting ecosystem article for cloud-automation content.