Most capacitors are drained heavily just by being unplugged for a short period of time, as the other poster mentioned. The other thing is that the capacitor wo

Most capacitors are drained heavily just by being unplugged for a short period of time, as the other poster mentioned. The other thing is that the capacitor would need to somehow be shorted to a component it wasn’t supposed to… instead of just itself. Shorting to itself is relatively safe (although might result in a pop and some arcing). For something like a toaster (especially the old school ones with just a dial to control toast degree) they’re all mechanical contrivances. No electronics to speak of.