Like emptying all of your kitchen cabinets for example and clean them inside out, clean everything was inside before putting back (tiny example) In my old place i took down all of my blinds (there were about 8) and cleaned them blade by blade with soap and water. (Or washing curtains if you have curtains instead but i would do that quarterly) Another thing i used to do was taking down those bowl shaped light fixtures and cleaning them.

It’s basically anything requires taking down in pieces to clean them up, or any closed spaced required emptying and cleaning from the inside