Hello bruce the boss, unfortunately the camera will have to undergo surgery to fix the issue.
It'll need the guts removing and a good look over to see exactly where Water has entered the camera and it will also need the optics to be cleaned as well (a basic clean will make images more clear).
Replacement Silica gel packs will be needed as they'll have absorbed as much water as they're able.
Not too sure on the suitability of petroleum jelly with the gasket, probably best to find a suitable silicone safe grease or at worst you may need to use a silicone sealant (that's if you've got a bad leaking issue that really needs to be fixed).
And I forgot to mention that if you have access to an Air Dryer it would really help to remove moisture quickly without damaging the housing, optics, cabling and electronics. As they can achieve a constant 40°C.
Hope that you get it sorted out though and good luck.