1. Lubricate the window tracks. This is the most common cause of window squeaking, and it can be fixed by applying a silicone-based lubricant to the tracks. You can do this by spraying the lubricant into the tracks or by wiping it on with a cloth.
2. Clean the window tracks. If the tracks are dirty, they can cause the window to squeak when it moves up and down. Clean the tracks with a mild detergent and water, and then dry them thoroughly.
3. Tighten the window bolts. If the window bolts are loose, they can cause the window to squeak when it moves. Tighten the bolts until they are snug, but do not overtighten them.
4. Replace the window weatherstripping. If the weatherstripping around the window is old or damaged, it can cause the window to squeak when it moves. Replace the weatherstripping with new weatherstripping that is designed for your car.
5. Adjust the window regulator. If the window regulator is out of adjustment, it can cause the window to squeak when it moves. You can adjust the window regulator by following the instructions in your car's owner's manual.
If you have tried all of the above steps and the window is still squeaking, you may need to take your car to a mechanic for further diagnosis and repair.
