Some of our windows don't get opened much. Now that it's heating up (91 tomorrow!) I noticed they are hard to open, so hard I'm afraid I'll break the latch. What do you all use to keep the channel slippery? The ones we use a lot are fine. Silicone, or? ^.^d
I use dry silicone spray and soak the blazes out of the tracks.
Water and tooth brush to clean dry with rag or cue tip, spray with dry silicone lubricant
There are some really great dry Teflon spray lubercants available now. I have used mclube in the past with great results. Not very good results with the crap they sell at Walmart.
Suncoast Designers used CRL wax in a tube (applied with a wooden stick) to un-stick my windows, get it at Amazon....
Also, 3 in One makes a new product, 10 oz. can about $6, called RVCare Window & Track Dry Lube, 3-IN-ONE Oil Corrosion Protection | Stop Rust, Lubricate & Protect (http://www.3inone.com)