Here are a list of some commonsense tips for looking after diving equipment. Some are obscure pearls of wisdom, others are so blindingly obvious you might wonder why they need to be said - but many people have been known to do (or not do) them on occasion.
Never leave cylinders standing up (except in the dive store, or a filling station where they won't fit otherwise). If they're not standing up, they can't get knocked over.
Always wash equipment in fresh water after use. For delicate or unusual items ask if you are unsure how to care for them.
Computers, dive timers, torches and other sensitive items should be kept separate from other kit and kept dry when not in use.
Always, always remember to put the dust cap back onto a regulator first stage when it is removed from the cylinder. Make sure you dry off any water before you put it back - a quick breath will do - don't use the air from your cylinder
When a suit is folded up in its bag, leave the zip undone, so that it doesn't get broken. When the suit is hanging up for storage or to dry, use a large sturdy hanger (like the kind for a smart jacket or big coat) and then close the zip so that the neck is not put under stress.
Don't put a thinsulate undersuit into the same bag with a soggy drysuit after a dive.
Always remove any weights from the pockets of a BC after use.
Always drain the water out of a stab after use. To do this, partially inflate the stab, then turn the stab upside down so that the water collects down the inflate/dump hose and open the dump.