my 08 legacy does this. sticky when exposed to direct sunlight. i had my whole front windshield tinted. same thing. contacted mother's since i use mothers protectant and i was advised to use mild soap and water to remove excess build up of protectant. no improvement. tried leather/vinyl cleaners, dishwashing soap etc. also observed that while parked inside, the dash turns really matte and a powdery white residue would develop. been using baby wipes for the meantime to clean the dash but it still gets sticky