My wife has a 03 Zafira with just over 70,000 miles on the clock. The issue is that when the front windscreen gets steamy it takes a long time for it to clear, even when the fan is blowing as fast as it can and the air is on the hottest. Ive placed my hand over the vent and noticed that it is not blowing that hard. Ive also noticed that none of the vents seem to be blowing that hard and Im not really to sure whyI dont want to take it to a garage and get taken for a ride esp if it something that is easy and I can do. If anyone can help then that would be great.