After a day underwater, your gear deserves some loving care to stay ready for...

https://zulu-wiki.win/index.php/Dive_Operator_Habits_That_Make_Camera_Care_Easier_at_the_End_of_the_Day

After a day underwater, your gear deserves some loving care to stay ready for the next dive. A quick freshwater rinse stops salt buildup while giving your camera gear fresh relief