I've been using Litter Clean for my two cats for over a year. Lately I've noticed both cats cough a lot.
When pouring Litter Clean into the litter boxes I've noticed there is a lot of dust that flys all over. Everything else that Litter Clean is supposed to do I'm fine with, but I'm changing brands because it may be affecting my cats health.
Watching a cat cough, is a very disturbing experience.