I use soap and water, then spray with a chlorhexadine solution. The chlorhex. is cheap when you buy it in the gallon form. Reptilebasics sells a pump to go on the gallon bottle that pumps the correct amount to mix the solution. I mix up some in a 32 oz spray bottle each week and use it to spray the tubs, hides, and bowls after cleaning (I rinse the water bowls once more after spraying). I like that chlorhex is safer than bleach, yet kills the bacteria, etc.