I have a 14 year old cat and we've had her since she was a kitten and haven't changed her litter or the box at all. Anyway, I don't think that me and my family have been cleaning her litter box correctly for all this time. She has the type of litter that clumps and her litter box is just a normal pan with a rim on the sides. We scoop the clumps out once a week or so(i know its ment to be done once a day now and i'm going to start doing that so please don't yell at me). But Im sure thats not all were supposed to do. How do I actually clean the box? or have I been misguided and I'm not supposed to clean it at all? I'm also going to get her a new box thats bigger for her(like I said we havent changed it since we got her)but the same style, so if you have any advise on that it would be appreciated.