In my experience, it's 1). scooping regularly, and 2) change the litter when it first starts to lose the potency. The only time I had a cat smell problem was a

In my experience, it's 1). scooping regularly, and 2) change the litter when it first starts to lose the potency. The only time I had a cat smell problem was at the start of the quarantine, and my litter delivery got delayed. I still scoop regularly, but the remaining litter had obviously been less effective in containing the odor. Since then, I've had a double-buffer for cat litter supply.