If I knew maybe I could stop. >.< Multiple friends have told me I am not allowed to touch their toasters any more, and we unplugged ours as soon as we moved in (it came with the apartment) and it is shoved into a back corner to keep me from temptation.
Last place we lived we just left the toaster plugged in but I wasn't allowed near it... until one day I walked past and it turned itself on. I freaked out and pulled the plug then went to get mom
No clue. Thought I had an answer as a kid when I knocked over the toaster and my ring fell out. (My sister had put it in there) But given it keeps happening.... I somehow doubt that was it.