Cleaning the drains below the hood hinges is only half the job.

If they are plugged the water builds up and runs under the hole in the bottom of the vertical sheet metal just inboard from the hood hinge. I then runs down to an are between the firewall and wheel well. There is another drain in that area on each side under the master cylinder and the battery.

Keep working at it and you will get it straightened out.

Good luck,