I used to monitor my snakes when they would pee / poo when I had them on paper towels. I would go through all 20 tubs and change out the paper and clean at least one tub per day. Since I changed to Reptichip I can't tell at all when they go to the bathroom other than when they poo a real big one HA. So I'm not even knowing when they pee now, I don't even worry about it, I only spot clean twice a week and it's only a few tubs, can't even smell their pee with Reptichip. I just keep all the waters full and fresh. I change out my Dixie cups and give fresh water about once a week. I also started cleaning and reusing my Dixie cups, saves a bunch of money, I just save up a month or two worth of cups and clean them all at once by hand. Gotta love those Dixie cups! I think it's funny that people become obsessed with what comes out of their snakes LOL.