We rarely use the rear windows and I noticed recently that both of them are "screeching" while opening and closing. One is worse than the other but the sound is terrible. I couldn't find a reference to this on the forum but has anyone experienced anything like it? I'm traveling and will not have access to the car till next week. I didn't get a chance to record the sound but it is more than just a squeak. I tried opening and closing several times but it didn't make much of a difference.