Like the title says I have a leak that is coming from behind my glove box and it only happens when it rains or I wash my Jeep. It’s not coming from the floor since my Jeep is almost completely rust free and I can see it dripping on my floor bored from Uber the glove box. Could it be my windshield seal or what else should I check?

 

It's a very common leak point, could be the windshield but it's likely the air intake under the cowl. Really it could be a lot of things on the firewall, may take some time with a hose to locate it. Here are some threads that may help.
https://www.cherokeeforum.com/f2/two...fusion-255409/
https://www.cherokeeforum.com/f2/wet...-board-255393/
https://www.cherokeeforum.com/f2/water-cabin-249917/
https://www.cherokeeforum.com/f2/wat...-board-256047/