I added relays to my power locks and now am doing the same for the windows. My rear driver window is so bad, it goes down about a quarter of the way, then binds up in one side of the window run and yanks the top corner of the run out of the frame and stops. I tried some silicone spray but that did nothing. It will go down all of the way if I clamp the run in the frame and force it by hand. I guess the runs harden and shrink up over time, causing the window to bind up? Is there anything else I can try? Would it be worthwhile to take the run out and work it over? I'm at that slippery slope where the the overall state of my truck dictates that spending a few hundred bucks on new window runs may not be the wisest investment.