dude, seriously?

even with 4 mice in a 20qt, your looking at a helluva lot of byproducts to be left around in a 2-3 day period. You say when you tried babywipes you had to wipe it down several times a day to keep the ick away. Thats pretty much admitting that you do have ick problems NOT cleaning the tubs. That's very cruel to keep the animals like that for a variety of reasons, not to mention sanitation. Do you really want to feed your snake urine encrusted mice? Are your allergies so bad that you can't even lay down a couple layers of newspaper? Seriously, ANYTHING is better than nothing. I have a hard time believing you are also not having any smell problems this way. And the smell to you, is 100x worse for the mice in the cage, as they not only have much more sensitive noses, but are right IN the urine and feces they have left, and have no escape. I really don't see how you have accomplished said "ditch" unless you have your tub tilted at an angle. If so, that angle must be pretty steep if all the feces runs down into it as well. So steep in fact, I bet your mice slide down into the nasty pool of piss'n'poo. And to me that doesn't sound like a mouse version of a fun waterpark. WooHoo would probably not be their response. More like Pee Ewww. Torturing your mice just to provide food for your snake sounds pretty cruel to me.