Odor neutrilizer for cat litter box.?

You are fortunate that you have an extremely tolerant cat. My male cat will absolutely boycott the cat litter if I make any changes such as to the type of cat litter or put any odor-eliminator products. My suggestion is to save your money and shift the cat litter box into a more well-ventilated room/area where the bad smells can be carried out. You suggested the garage. Yes, that would be a good place.