Water stuck in blower housing leaking to floor when driving 1998 Dodge Grand Caravan

I removed wiper arms and the cowl on my 1998 Dodge Grand Caravan. Removed debris from catch screen on bottom side of cowl. Unclogged drain tubes with long hanger wire and blasted hose water through tubes. I also poked the hanger wire in a hole at the corners where the bottom of the windshield, the hood, and the pillar all meet. There was resistance at first, then the wire poked through, so possibly that was clogged. Water is dripping into van on front passenger floor. I pulled back the carpet and insulation from floor and from the wall leading up under the dash. Now I can clearly see when I drive water running down the rubber like padding that was under the carpet and insulation. It appears to be coming from what may be called the blower housing. A black plastic box that is back behind the glove box that is held by screws from the underside. Big drips form on the screws when van is sitting after driving. I can also feel a bit a water at the seam where the bottom of box meets the upper portion after it is screwed together. I think I may have solved my clogged drain problem, but possibly this leak is just water that is still left behind from when it was all clogged up in the cowl and drain tubes and this water is trapped in the blower box, or called heater box? It only seems to come out when I am driving. So it will appear to be completely dry. But if I take the van out for a drive, water comes leaking out. I have tried quick turns and sudden stops to try to get the rest of the water to come out. But water is still trapped in there. The only way to truly know if I have solved the leak is to get this water out, and dry the box. Then see what happens after the next rain. Water was getting in from the rain while the van was parked in the driveway. Clear water. Not stinky or dark. Carpet has been dried out by putting a small household van on the front floor, setting it on high, and leaving it on all day and doing that for a couple of days. The insulation padding under the carpet was really soaked like a wet sponge even when I thought the carpet was dry. So don't let a dry carpet fool you. It you have really wet carpet, you NEED to pull it up to dry the padding underneath or it will mildew and mold. And smell. I also leave my vent windows and front windows cracked open at night and all day long if I know it is not going to rain. I am not mechanical, but can't afford a mechanic to take hours and hours like I have to possibly not succeed. I read how when you remove the cowl, you will see the metal lip under the windshield and that water is supposed to fall off the lip into the trough and down the drains. But that some water rolls back and travels on the underside of this lip and then enters the air intake vents. (There are like 3 or 4 rectangle holes with rounded corners on the back wall) It is reported that if water enters these air intake holes then it will run down the firewall and enter the van's interior. I did what others have done and got drywall corner bead molding. (strip of aluminum in a right angle) I siliconed it to the underside of the metal lip that is under the windshield. That way when water falls off this lip, if any tries to roll back under the lip it will meet the molding and run straight down the molding and fall off into the trough where it is supposed to go. I did make cut outs for where the wiper assembly moves back under that lip. If anyone can tell me how to get the water out of the plastic housing behind the glove box I would greatly appreciate it. I am a 57 year old mom and wife and really need to have a dry van! I love my '98! Never liked the new boxy styles. Much appreciation in advance, anyone?