Common eBike problems and solutions

Hey everyone!

Just got back from a great 20-mile ride on my hardtail eMTB – mostly paved paths but a few gravel sections too. It got me thinking about common eBike issues. I've been lucky so far, just a flat tire here and there, but I'm curious: what are some of the most frequent problems you've encountered with your eBikes, and more importantly, what clever solutions have you found? Battery degradation, motor quirks, controller issues, or even just annoying creaks – let's hear your experiences and wisdom!