It sounds like you don't believe that the uncluttered clean spaces are *yours*. A lot of people (myself included) leave lots of stuff around as a mark of ownership, subconsiously, like, well, pets !@#$ing on things. Plus there's the issue of you spent $$ on the stuff, so it makes you feel vaguely guilty about not having it anymore

I don't actually have an answer to it, just empathy.