The pink stuff in the toilet.

I think I'll try the olive oil thing as well. Not much more expensive than the pink stuff and if it doesn't evaporate, that's all good.

I've always left some "pink" in the bowl. Never had a problem. About evaporating? Can't say I've ever had a problem with that too. First time using it, it washes right down. Normal cleaning after that, the first time, and there's no evidence it was ever there.

So, even if it does stay pink or stained a little ... does anyone really care! It's not like anyone ever posts photos of the inside of their toilets and proudly display them for family members and friends on Facebook or anything!

The olive oil treatment sounds interesting. I may try that this year. When I winterized this year, I pushed the peddle and, "thar went the pink ... " I don't have any more to put in there, so I think I'll try the olive oil, especially since I've got some around the house... why not?

I put some pink stuff in it and watch it to make sure it doesn't dry out.

There are several variatations to winterizing your RV. The pink stuff doesn't have to remain in your plumbing lines and fixtures, it only has to displace the water. Some will blow their lines with compressed air, add antifreeze and then blow them out again.

I put about an inch of the pink stuff in there. And watch it throughout the winter.

Some of the pink stuff has alcohol in it and that, over time, can actually dry the seals out. There are versions of the pink stuff with just Propylene Glycol in it that won't do this.

Doesn't matter at all. The seal doesn't care if it is wet or dry.

I use olive oil in toilet bowl.........over winter or during periods of non use.

Olive oil doesn't freeze (gets slushy), doesn't evaporate, doesn't go rancid and lubricates toilet bowl seal keeping it flexible/pliable

I also pour some in all 'P' traps too.

Don't use any anti-freeze as I drain and blow-out lines. Even when we lived where it snowed/froze

I've done it both ways and it doesn't seem to make much of a difference so I quit putting it in there.
The pink stuff kinda dries up over the winter though and makes a mess that you have to clean up too.

Being dry is worse so keep some in there to keep the seal moist...