Hi, just a suggestion, but how about one of those steam blasters, the kind they use for cleaning tile grout etc. I have never tried one but they look like they would work pretty good for nooks and crannys, if you were to clean the grooves and weather strip out first then like Jon suggested use a dry silicone lubricant those windows would probably almost open themselves.
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Keith, Krista and Family
77 38' Newell Coach Repowered from Smokin' V555TA To 325hp 8.3 inline 6 cummins, Allison 3000 series trans
87 40' Newell Coach 475hp 8V92 DD(sold)
22' 350hp Jet Riverboat
79 Ford F250 4x4
Many others to list
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