Try pushing down on the stainless steel "ramps" on each side of the deflector, see if the deflector is reacting to pushing down. There are a few possibilities. If the deflector doesn't respond to the push-test, either the deflector or the ramps are broken. Gets pretty involved explaining how to replace the deflector. If the deflector responds to the push-test, either the deflector needs adjustment (if when closing the roof the deflector closes a little, but not enough, it's probably in need of adjustment)OR the part on the roof that pushed on the ramps are broken or worn out......Gilly