Accumulator
Well-known member
Belated addition to this thread, just in case somebody finds it via a SEARCH at some point in the future (not slamming any of the previous suggestions, just posting some hard-learned caveats)-
Be careful that the aggressive methods don't cause (new) problems. I've had plenty of (summer) tires that were so soft that I couldn't use a brush on them lest I mar up the sidewalls, and said marring is forever. And some products that get rubber nice and clean can also dry it out and/or mess up wheels, especially wheels that have a compromised finish (e.g., don't get strongly alkaline products on bare aluminum). If in doubt, I'd use the admittedly pricey Griot's Rubber Prep, which I continue to consider a true miracle product; it's never failed to clean up nasty rubber/plastic surfaces for me, and it's never damaged anything.
Be careful that the aggressive methods don't cause (new) problems. I've had plenty of (summer) tires that were so soft that I couldn't use a brush on them lest I mar up the sidewalls, and said marring is forever. And some products that get rubber nice and clean can also dry it out and/or mess up wheels, especially wheels that have a compromised finish (e.g., don't get strongly alkaline products on bare aluminum). If in doubt, I'd use the admittedly pricey Griot's Rubber Prep, which I continue to consider a true miracle product; it's never failed to clean up nasty rubber/plastic surfaces for me, and it's never damaged anything.