The front sunroof drains were clogged in my 2018 VW Golf Alltrack. Windows were steaming up during the day due to the excessive moisture in the car. After a rain water would leak through the headliner. So I pulled off the plastic covers under the windshield wipers so that I could find and view the rubber drain tubes. I then inserted a piece of stiff clothesline wire which I slowly rotated with my cordless drill to clean out the tubes. To confirm the tubes were clear I poured a gallon of water into the drains to ensure that the drains were freeflowing.