how can i stop a water leak

i have a leak somewhere above the dash that leaks water whenever it rains. my windsheild seal looks to be good and i can't see any place it would leak through. i took it to a shop and they said they would pull the windsheild and see if theres any rust if so i would have to re build around there or it might be under the grate between the hood and windsheild, or he said it might be coming from around the door area. i don't see any rust anywhere in that area and there shouldn't be any it was kept in a garage it's entire life untill last year so thats why the problem only popped up last year when i bought it and don't have a garage to keep it in. but i don't get any leakage when diving it only when parked can anyone come up with any suggestions.

thanks
rob
ps i don't have any money to spend to fix this so i'm looking for real cheap ideas thanks
:salut: