FSM's from some other manufacturers say you should 'Dry' out the canister.
Low heat, under 150 degrees, for an extended period of time, like 15 hours.
Those same FSM's have a safety warning to use specific 'Tool Part Number' ovens to dry the canisters in, so I'm not going to buy an oven just to dry out one canister!...
IF the canister it's self is the problem, and it's not damaged externally, you can dry the canisters out, but DO NOT put them in a gas flame oven!
The canisters will off gas fuel vapor as they dry out internally and having them in with an open flame is a BAD IDEA!
An "oven" for storing electrodes will work, and you can make a suitable one using an old metal mailbox w/door. Install an EE-rated fixture and use a 100W bulb - one of the "security" lights with metal cage & glass globe over the bulb is great. Drill a couple small holes in the mailbox to let it vent fumes. You can use it for storing electrodes, drying vapor canisters, or even reactivating desiccant packs.
'90 YJ w/4.2l & 4.0l head, Weber carb, 5-speed, 4" RC lift, 33x10.5x15 BFG MT KM2s.