Makes me wonder if our new electric blanket will overheat or catch on fire while sleeping. I turn mine off when I get in bed. It's still plugged in so IMO it can catch on fire?
I don't know what else to use to stay warm. I put the heater on 65 or 66 depending on temp that night. We don't like lots of heavy covers to sleep with.
We had a waterbed years ago where the heater for it shorted out. It burnt a hole in the mattress but it kept melting it back together. We found it when we were packing to go on vacation. We had to deal with it when we got home after we unplugged it & drained it.
We got a new mattress with heater when we got home since it was still under warranty.