I've tried using regular cat litter, but having to change the entire box every time it needs to be cleaned actually ends up costing more than the clumping litter, and it just stinks! I've found the best and most cost effective way to keep the litter box clean and sans smells is to use a good quality scoopable litter found at any big box store (my fav is Fresh Step-scented). With 2 cats scooping it out just once a day using dog doo bags and throwing out right away keeps all smells pretty much at bay! Dont's save it in a garbage can
, that defeats the purpose of scooping it out other than to please the cats-this will do nothing for getting rid of the smell! I keep the litter box in my bathroom, so just keep a small broom and dust pan tucked away for the scattered litter in between cleanings! This method works great! My bf says he thought all people's homes that cats lived in stunk...till he came to mine! He couldn't smell a thing and I actually had to show him where the litter box was the 1st time he came over!