I rinse all my gear in fresh water after every dive. Every couple of dives, I’ll let my masks and snorkels sit in a bucket filled with soapy water for a while. I’ll also dunk my regs in the same bucket (dust cap on, don’t push purge button), then rinse with fresh water. And every couple of dives, I’ll soak my wetsuit in warm water with shampoo, then hang out to dry. For my BCs, twice a year I’ll mix a small amount of clorox (not sure if it’s good or not) with water and poor down the inflator hose to get into the BC (helps kill germs and keep the bad smell down. I then add more water and rinse it all around for a bit, then drain, rinse with more fresh water and drain again.