I use a mixture of cypress mulch and ground coconut bark in most of my cages (boas and balls). Whenever they poo or I notice a wet spot from urine, I take out the wet stuff and a few inches around it and wipe the floor with a paper towel dampened with Windex. Then I arrange the bedding to cover the empty spot. Once a month I completely dump all bedding, clean out with Windex, then replace with new bedding. I never have any problems with smell or mold.