I've been using non clumping cat san for my 12 week old kitten, I'm finding a 20l bag is not lasting long at all! I get poos out as soon as she does then but of course the urine doesn't clump so can't be removed. After 2/3 days it stinks the whole house out so I'm changing it so often, but a 20l bag is around £15! Not cheap. Any other recommendations or anything else more cost effective? Thank you 😊