20 years and nearly 2.5 million miles in the KW, and I swear by Rain X, to the point that once I got pulled over in Ohio by a cop because he saw I wasn't using my wipers in the rain. When I explained to him about using the Rain X and showing him the bottle I kept under the seat he thought I was crazy and let me go. Still use it on all of the cars and trucks now as well as the HD.
