Floor wet after rain don’t know where it’s leaking
 

After a hard rain the front carpets on both sides are wet. I don’t think it’s the door seals (could be but I can’t find seals for it anyway)
I’m wondering if the fresh air vent outside at the bottom of the windshield might have a drain hole that’s partially plugged.
has anyone else had the same problem?
where do I find the drain hole to blow it out?