I have 2, for 2 kitties, and they're ancient - about 12 and 11 years (the boxes, I mean). They smell a little, even though I wash them out every 3 weeks, and I really want to get rid of them.
I bought a new one several months ago (primarily to try to stop Celia from pooping on my bed), washed it thoroughly, filled it with the same litter, and put it in the bedroom. Not even a sniff. So I put it in the bathroom as an extra. They sort of peered in once and then ignored it. I finally took away one of the old ones and put the new one in its place. They absolutely would not use it - in fact they acted like they were afraid of it. I tried again a couple of days ago, because the litter level was getting seriously low and I didn't have time to wash the boxes. They still won't use it, so I put the old one back.
The new one looks different and is a different kind of plastic, but I can't find the old rectangular ones anymore. The current ones are all kind of rounded and look bulkier than the ones I have. The color of the new one is darker - blue rather than beige. Maybe the color's freaking them out?
Has anyone had this problem before? Is it just my kitties? I don't want to risk taking away both of the old ones to make them use the new one.
It just shouldn't be this hard to get them to use a new litterbox.