If you feel you should completely clean his tank, start by sterilizing one heating pad first. Then wrap it in a towel and plug it in. Let the towel heat for 1/2 hour in a container with a loose lid. Then put the frog in and secure the lid. This should give you an hour at least to thoroughly clean the enclosure. Remember to either replace the substrate completely, or put it in the oven on 175 for 1/2 hour to kill bugs and pathogens. If you use bleach to clean the inside of the tank, you should refer to the pacman care guide on the critter depot site and review the section on cleaning.