What to Do When the Car Floor Mat Is Always a Bit Wet Underneath?

[Susanna]

Here are the reasons for water accumulation under the car floor mat: 1. Observation: Check if the sunroof drainage pipe is clogged. Fully open the sunroof to see a groove. Slowly pour water into the groove (the sunroof drainage pipe) to see if the water drains or gets blocked. The outlet of this drainage pipe should be on the A-pillar or C-pillar of the car. 2. Inspection: Examine the door drainage pipes. Open the door, and you will find many small holes at the bottom—these are the drainage holes. Check if they are blocked. 3. Door Removal: It may be necessary to remove the door panel. Many small advertisements or business cards are often stuffed into the gaps between the door and window. If unnoticed, they can fall inside the door. Upon removing the door panel, you might find clusters of wet business cards, which not only block the drainage holes but also cause water to seep out.