[DRU]

I second the Fresh Step. I've been using it for years with two cats. They both like it (which is the most important thing, and there are some litters cats don't like.)

I have an attached garage and I put a cat door on the door from from the garage into the house, so the cats can get in and out of the garage as they please. I have the litter box out there, so the smell is never in the house at all.

As for the smell, I too used to go 2 - 3 days (sometimes longer) before changing the litter. This only things makes things worse for you and the cats, though, and eventually they will start to tell you they don't like it by pissing all over the house, which you definitely do not want.

Finally, after a few years, I learned that I just need to clean the box a lot more often. As of the past year or so, I've been cleaning it out every single time I feed them. That has now just become part of the feeding routine. While they eat I clean the box so it's ready when they're done.

Not only does this keep them going to the box and using it consistently, but it also takes about 20 seconds (2 or 3 quick scoops) to have it clean and ready to go. It doesn't smell, either, because the litter does a great job of absorbing it when there isn't much in the box. When you let it sit 2 or 3 days you end up with clumped up goo that you can't easily scoop, and then it can take you 5 - 10 min or longer to get that thing back in order, and it's not pleasant of course.

So again, just commit to doing it more often. Make it part of the feeding routine or some specific time every single day (multiple times per day is even better) that you'll make sure to clean it and it'll be better for all involved.