that used to happen to me sometimes if i rolled the window down all the way.
theres a little isolator tab near the top of the door that pushes on the window, and if you roll it too far down the window can get stuck under it. the tab is most likely just bent out of shape, that was my problem.
good luck

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MAC Fenderwell CAI, MAC Catback 2.5" duals, MotoBlue 42%UDP's, Performance Distributors S/D coil & Taylor 8mm's, Diablosport Predator tuned, Steeda Tri-Ax, Spec Stage1 Clutch, Spec Aluminum Flywheel, FRPP Aluminum Driveshaft, Steeda Clutch Quadrant, Steeda Firewall Adjuster, 3.73's & FRPP T-lock, Zex 75 wet shot w/single outlet purge.
/ Flat Rate Hyundai Technician

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