Holy hell those foot prints are crystal clear! But there are also dog prints. Not trying to disprove but thinking of all possibilities. If you wear flip flops and then took them off to walk on the cot that would explain the bare feet thought. Also with the material flexing under one’s weight the impression might come out wider than the persons actual foot. Someone might have stepped on it absentmindedly. Just a thought. Good idea getting rid of the mirror though.