We use a "flushable" clumping corn-based litter. We don't actually flush the clumps of litter, that's a recipe for disaster. But it does mean I can scoop poops directly into the toilet and flush them. (My cat never got the memo on burying poops, but she does warn us when she's going to go, so I can get them right away.) I scoop the clumps into those little green dogpoop bags, and put those in a lidded can with a liner. It's not perfect but it's not bad. We also discovered our bathroom vent fan just went into the walls, so we had a contractor run a proper vent duct to the outside, made showering in there much better as well.