Product review (5 stars): Kel 100% silicone spray
My Lexus dealer recommended 100% pure silicone spray to lube window channels. After trying to find in local stores I resorted to good, old Amazon. The product is great and lasts much longer than other lubricants. The vendor, Ace hardware whse, got it here in a jiffy and in great shape. When you can't find something locally, remember Amazon.