[PepeLePew]

I feel your pain buddy... they do look good on your car when clean (nice wheels btw too!)

The other thing I was thinking is that maybe its brake dust making them dirty... still doesn't explain why it only messes some of them up though. But maybe switching to a "cleaner" brake pad might help.

Other than using a tire pen to whiten them up though, the only thing I can think is to give the Tire Stickers guys a call and see if they have any suggestions. Like maybe there is some kind of teflon spray that keeps dirt from sticking. Or maybe using the tire sticker shine will make them easier to clean when they get dirty... worth a shot.