I have always thoroughly cleaned every house before I left with one exception. That was because I knew the builders were moving in to start work the next day. The new owner demanded money for removing stuff that I didn't want stacked outside in the front garden. However, before he took me to court, as he threatened, the removal that I had already booked – two days after moving – had been completed.
Forgetting where you left your keys does not mean you are “losing it”