I'm planning on factory reseting my iphone because of cache and storage issues, and then restore from an iCloud Backup, I did that before when needed, but now I have an apple watch paired to it and never done it on that circunstancies, so how should I proceed while doing it? can I just factory reset the iPhone and when I restore the iCloud Backup the watch will automatically re-pair itself, or should I take some extra steps with the watch to not mess things up (aka, lose all my settings in watch or need to reset it too)? what is the proper way to reset the iPhone if I have an Apple watch paired to it?