I have been using terry towels to dry my car and clean the interior (dash, instrument panels, etc.). Today I noticed that my instrument panel has light swirl marks, as well as the area around my volume knob on the stereo and the hood of the vehicle. I don't see how these swirl marks could've appeared. I'm gentle when it comes to using the terry towels. Now, I bought one set of them and have been using them over and over (I do wash them, though) for about 3 or 4 washes. Is this a bad idea?