Will my tires ever come clean

[Accumulator]

Give [the Perl] a shot and see how you like it. ...

Might try that if I ever use up my, uhm...accumulated...stash of other stuff.

how about a graphene based spray and rinse product..

I might be in the minority (again), but no spray-rinse products for me, thanks.

IMO, everything has a shelf life to some degree...

Probably right, but I have stuff from the 80s that`s still fine, and I generally don`t consider something "old" after just a decade on the shelf. I bought all those Tire Slimes (other than the Z16) before we got this house, and that was about 20 years ago. Actually, I bet I bought a large % of my Detailing products back then.

[Coleroad]

I`ve used several different tire coatings. All I`ve ever done is wash them twice with whatever tire cleaner I had at the time. The only reason I did it twice was gor the same reason we crosshatch, or applying two layers of wax. To make sure nothing was missed. Made sure they were completely dry, and cool. I`ve never had a longevity issue.