After having to thaw the car and van doors Monday (with warm water) after the flash freeze, I picked up a can of de-icing/defrosting aerosol spray from Home Hardware. The doors refroze so I was able to test the product - and it worked well. The small nozzle (a la WD-40 can) fit inside the door seam so I could direct the spray to where it was needed most. The product can also be used to defrost windshields and unfreeze stuck door locks.