I agree with what's been stated. Those salts are corrosive and can & will do damage if left unchecked. I've used a solution of hot water saturated w/baking soda before; shot it into the vent holes w/a syringe & large inside dia. needle obtained from the pharmacist. Afterwards used hot distilled water followed by long session w/a hair drier to insure all water was out and then a few drops of 30 wt motor oil also using syringe before plugging vent holes w/small piece(s)of soft shot.