I have a set of Continental Touring tires with the white reflective stripe on the sidewalls, and they get pretty dirty with road and brake grime. Normally I would clean with car soap and water but sometimes it doesn't get all the dirt off/make them look new. It is also winter right now so it is harder to soap and water wash in the garage. I did use a washcloth and clear water from bucket. It helped a lot but still a long ways off. Is there a way that I can make the stripe clean and bright white again?
NOTE: The reflective strip on these tires are a tape that is added to the tire. I have another bike with different brand tires where they might be painted on.