O.K., my husband just shakes his head and walks away. And I am sure many of you will think of several dumb blonde jokes, but... Am I wasting my time cleaning all the little chunks of gravel out of the treads of the tires? I rotated my tires (myself!!) this weekend. Ran into a problem but got lots of help on another thread. But, I also spent about 15 minutes per REAR tire cleaning out pieces of gravel from the tread. For some reason, and don't know why, the rear tires collected all the gunk, the fronts had almost none Anyway, my reasoning is that it helps maintain traction and could prevent a flat. Am I wasting 20 -25 minutes (as well as gouging out hunks of skin with the tire iron) for nothing?