I tried this once, but then Maze wouldn't use the hides if she could see me walking around lol! Now I have the lower half off the tub blocked with construction paper, and she's none the wiser..... and neither am I about whether to spot clean. I just check under everything once a day, except the hide she's in if I can see her.
As for the smell.... it depends on your substrate choice. I use coco chip and can't smell pees, but I can definitely smell poops.
Speaking of which, I think I caught her about to Do the Deed.... didn't see her under the humid hide until I picked it up lol. Poor noodle.
(Maybe later, then.)