If I'm away on vacation, then my gear just gets a very quick rinse or dunk at the end of the trip, or (for regs) if I'm not diving for a couple of days. Nothing special.
when I get home or after local diving (where our sea is very saline) it gets a better clean.
I have 2 x 50 gallon rubber maid bins which get filled with warm fresh water from the hose. In one goes wetsuits, rash vests, gloves boots fins, the other has BCD, regs smb slates knives torches etc. Both get left overnight to soak, then hung to dry in a shaded area after being hosed down.
A few times a year I remove the rear dump from my wings, and dsmb's etc and allow to fill with water and site there over night - they get flushes and dried in the same way.
Tanks and weights get hit with the hose pipe while they're in my truck bed.
Most of the year we dive weekly so everything goes back into bags. For the couple of months we don't dive them everything goes into plastic storage and wet suits get hung.
For the winter my Dry suit goes in the shower with me. When it warms up gets a clean inside with a damp sponge .