The first method is that there is water leakage in the trunk of the car, usually because the rainwater flows into the trunk when it passes through the taillights. Check whether the sealing strip of the trunk is aging and needs to be replaced. If so, replace the sealing strip. Can. When washing your car daily, remember to clean the sunroof and trunk drains along the way. Wipe off the dust and sediment in the sink, then unclog the drainage holes, and pour in clean water to rinse.
The second method is to lubricate and clean the sealing strip. The specific operation method is to clean the sealing strip with a damp cloth to avoid fine sand sticking to the sealing strip. You can then use talc or baby powder to absorb excess oil and moisture from the seal.
If the above methods cannot solve the problem, it is recommended to go to a regular car repair shop for maintenance and repair.