I was wondering what a car litter pan was... Mine's water dish can be kind of slick when there's water in it, but I've never noticed him having trouble getting in and out. He's grown so much he pretty much fills up the whole thing. I'm moving this summer, so hopefully he can inherit my snake's 10 gallon when I move her into a 55 gallon long. Ha, it's funny, because he'll still just use his one little corner of dirt