I personally don't ever use bleach and never would, weak or not. Its Chlorhexidine for me. Valley vet has it very cheap and that gallon bottle will last a long time for most. I clean completely once per week. I remove all urates/feces and then spray down and wipe with chlorhexidine. I then spray again and let stand for a couple minutes before wiping. Fresh liner and fresh water and they are good to go!