Silicon spray gets the vote
I did a kinda halfassed job with the original application of silicon spray, so I just resprayed the window gaskets making sure to spray/wipe thoroughly inside the full gasket, including the bottom which I may have omitted last time.
For Taco experiment #2 I decanted some of the RainX windshield fluid into a spray bottle and cleaned the exposed truck windows with it. Mirrors too.
Well, not all of the exposed windows; I left a couple untreated as controls. I need to label the spray bottle of RainX washer fluid, it is a fugly orange hazardous waste color.
Cleaned out those emptied Windex/etc spray bottles are handy in the shop. I always have one filled with clean water for Gorilla Glue use and small clean ups.
Bleach solution in those spray bottles works well for decontamination work, but only once. Even 10% bleach solution eats the pump mechanism if left to sit too long.
Hmmm, I wonder if alcohol would eat that used spray bottle seal?
I use a lot of alcohol in the shop (stop snickering Doug), and it would be really convenient to have a spray bottle of alcohol handy instead of wetting down a paper towel (arrgghh, too much) and misplacing the bottle cap (little white cap. . . . yeah, it is dang near invisible when left on the white benchtop).
I feel another experiment coming on.