[gypsycat]

Hi Uncle Fester- you know what, the solution was even easier than that. I had never turned it off since I bought it. My husband just turned it off, I left it off all night, and the next morning it was back to normal. I have since set it up to shut off automatically at night just for good measure. My husband is tech-y, and he says that just turning it off probably did it, and that it didn't need to be off all night. I never turned off my wi-fi or bluetooth. Glad to hear the reassurance not to worry about overcharging. Good to know. (tho I still don't know what caused it to happen) Thanks so much for writing. Have a good weekend!