This is one of the most extreme examples I've seen of mouse activity in a range. There were at least three large container's worth of dry dog food squirreled away under the stove top of this electric range. Original complaint was that the RF element would stay on, even when the switch was off. This was one of those over-engineered Frigidaire ranges with the ESEC (electric stove electronic control). Turns out the dog food was shorting two of the sensing terminals in the element causing the control to keep the element on. Removed dog food and problem fixed!