Originally Posted by Roosters 67
I use a round bottle brush shaped toilet brush about once every two to three weeks and "spin it " while holding the valve open to clean the seal, that makes the toilet hold water again. as far as storage and evaporation, you can use silicone oil or spray to keep the seal lubed and sealing. Then fill with antifreeze.
The brush is what I use to clean our toilet seals after every trip, about 5 trips a year.
I have two toilets and the coach is 11 years old with no repairs on the toilets and they hold water just fine.
Between trips I keep water in the toilet bowls along with a bit of Dawn dish soap. I put a half cup of Dawn with a couple gallons of water in the two black tanks and a smaller amount in the two gray tanks after I flush out the tanks at the end of each trip.
I don't close the lid on the toilets as they will get moldy.
Being in California I don't have to winterize and we use our coach all year so long term storage is not a problem.