Yes, could be dirt/dust in the window area. Also, make sure your windows are all the way up. Sometimes you may think you took them all the way up, but they aren't at they highest possible position. I find I have that issue sometimes and will periodically pull up on the switches and I hear a window move up a little.
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New KJ Gear -
Desert Armor Flak2004 Renegade Light Khaki - 4" JBA Lift - Rock Lizard Products: Komodo Dragon Rear Bumper, Prototype Winch-mount Front Bumper, Super Skink Sliders - All J's Super Tranny Skid II - 31" Firestone Destination AT's on Moab wheels - Cobra 75W CB w/ stock Antenna mod
[b]Retired, US Military