Leaking sunroof help not Tundra related

Looking for advice from this knowledgeable crew. My son drives an older Audi q3 and I noticed a decent puddle in the passenger floor. Cleaned it up and got it prettt dry but noticed it’s damp again. I assumed he spilled or left a window open in the rain but not sure that is the case now. It never leaked before and haven’t changed windshield or anything so it has to be the roof. Are there drain holes for that thing and if there are how and what would I use to clear a blocked tube. Thanks for any help

 

Sunroofs must have drains. I just did a drain clean on my Sequoia.

 

Usually have drain holes in the corners. Some weedeater string makes a good cleaning rod.