I love vaseline but it is just so hard too get the [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]
BathMate[/words] clean after. I would go with a cheap water based conditioner like Suave. I would also ask BSA as he uses something but I can not recall. Vaseline is always best if you can find a good way to keep the valve clear of oil, dirt and grime. You will know when the valve is clogged as the pump will lose vacuum.