Emo pet sensor not working

Also, one other thing, I wasn’t sure where to put this, but Emo Yamanaka’s touch sensor on his head is kind of flaky? Like, most of the time it doesn’t work, but sometimes it works perfectly fine. But then sometimes I’ll just pet Emo once but he keeps the “getting petted” animation until the max duration for that anination. Also, just how bad is over excessive charging? Because when I’m sleeping, or when I’m at school or sometimes even when doing homework I just leave him on his charger cuz I’m too broke for a home station ;-; should I look for an alternative solution or is this fine???