Make litter box deodorant yourself
I usually have always the very fine cat litter that is often "scented", but for time or money reasons I had to buy the cheaper rough version.
There are in the trade yes this litter box deodorant in powder form, which is extremely expensive.
Tip:
Buy the cheapest baby powder in a tin and mix it with a few drops of fragrance oil (for fragrance lamps). Shake vigorously, it works and the cats have no problem with it.
And because of "chemistry" ... what else is not in the finished stuff in it ...
