If it is a porcelain bowl any household cleaner and a brush will work. Must brush after letting it sit for a few minutes. I don't know of any that self clean. Be sure bleach is not in the product as it will eat the rubber seals quickly. If you tank is partially full and you cannot find a bleach free cleaner, the diluted bleach will not likely hurt your valve seals but suggest dumping tank after cleaning to be sure. Replacement seals are available at most camper stores.
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