It is a good idea to clean out your snail tank every 3 weeks – 1 month depending on the size and amount of snails. Transfer your snails to another tank or container to change the substrate and then give the tank a wash with boiling water and a detergent. Make sure the tank is rinsed very throroughly so no traces of any chemicals are left. The inside of the tank can also be wiped with a damp cloth every few days to remove any slime or dirt that has accumulated.
Depending on which substrate you are using, you may want to bake it to sterilise it for re-use. Coir (coconut fibre) and peat can be baked at around 200*c for around 1 or 2 hours. Substrate should be left to cool after baking and then dampened before putting back in the tank. Sphagnum moss can be cleaned by placing it in a colander or sieve and rinsing it thoroughly with water. Don’t use boiling water, as this might kill the moss.
Snails should be bathed about once a week to keep them fresh and free from any pests. Place them in a shallow dish of room temperature water and run water over their body and shell to clean them. Make sure the water isn’t too deep for them as they can drown if water enters their breathing hole.
If their shell is particularly dirty you can clean it with a soft toothbrush, or even your finger. Don’t be tempted to scrub the shell hard as it can easily get damaged. Never use any detergents to clean your snails.
You can also polish your snail’s shell if you want by gently rubbing on sesame seed oil using a soft cloth.
It should be noted that snails need a certain amount of bacteria in order to digest their food properly, so an overly-clean tank and substrate will do more harm than good.