run the AC it is meant to take condensation away and you must have a leak somewhere that will do it everytime.
Does she have an open bottle of water in the cupholder?
All it takes is a half bottle of Evian to be laying around to make you think the car has a leak.
Look around for wet spots.
I've never had condensation that bad... are the windows down a tad or something, letting in moist evening air? Had that happen once or twice last fall.
check the passenger front foot area for a leak