mm-qcamera-daemon wakelock when idle
This is a known bug with Android 4.4.2 KitKat.  Google is aware of it and are promising a fix with the next update.

According to the Google Code discussion, simply killing the responsible app is not enough to stop the drain. A reboot is always necessary. Uninstalling the app seems to be the only sure way to avoid having this happen in the first place.

Skype seems to be the most frequent culprit because its background services seem to interface with the camera, triggering Android's bug. It is recommended to temporarily uninstall such apps until Google releases the fix.