My apt. complex announced mandatory and new Parking Permit Window Decals. They required proof of current vehicle registration and return of the previous Decal. That part worried me. How to remove an adhesive decal that had been baked on by the Sun for two years?
But again, inspired by the recent events at the Reflecting Pool In D.C., I used this and a Q-Tip. Worked! Clean windshield too! Glue be gone! Tow Truck be gone!
Brooke's Blog 