I would only use Vaseline in 2 places at most. 1 on the o-ring on the bottom cap. The bottom cap isn't meant to be taken off except maybe for cleaning so it isn't really needed there unless you can't get the bottom cap all the way on. The other is the o-ring on the button. Take the o-ring off to do this though and then wipe off all of the excess before putting it back on the button.