The aluminum screened sliding window on the sides of my Westy scream like a banshee when slid back and forth.  Especially in a campground after quiet hours.
What's the best cure for this??  I don't want to put on some lubricant that won't get along with the aluminum (black smeary stuff from the aluminum comes to mind).

Dave B.
83 Tiico Westy
83 WBX Westy