I get a light weight plastic tarp and cut it to size for the appropriate area where they hang out. My two tend to sit for long periods in predictable locations. For example, there is one particular window ledge that has a good outside view of the trees, so I put a 15" wide strip of the tarp under the whole ledge. That way I can just take the plastic outside and hose it off with a high pressure stream of water. I also use this under where they eat and sleep. Of course, there will be "accidents" in other locations. We use a product called, "poop-off" for that. It is enzyme-based and non-toxic for birds. The key is to squirt it on and let it sit for a few minutes, to allow it to work, then wipe up. Brutus, the grey, is courteous enough to not go when I am holding him, but Jimpster, the quaker, is liable to go at any time. I usually look for signs of "squatting" and move him to a better location.