I have a single chin in a double level CN cage. HE tends to spend most of his time on the topmost shelf, so I sweep that off the most to keep it clear of poop (it gets flung EVERYWHERE otherwise). I usually sweep out the cage every couple of days with a small hand broom and dust pan I picked up at the dollar store. When the fleece liners start to get grody (every 1-2 weeks, depending on how much my little goof makes a mess or is inclined to pee in his litter pan 9.9 ) I pull everything out, sweep any lingering debris off the pans, change the liners, etc. I dont think you really can clean your cage too much. Especially if your chin is like mine and doesnt think twice about flopping out in an area where he's pooped..... I find bits of poop stuck to Pepper's sides/back from time to time and he never holds still long enough to make it easy to remove them.