I know, 'tis a topic we've all probably taken part in at some time or other, and the answers are generally similar; vinegar, rainex, fairy liquid etc etc. With previous cars a couple of minutes has been the maximum I've ever had to wait, hence I've avoided having to apply any of the usual suggestions. Having just watched my wife having to wait nearly 10 minutes before she could safely drive off - outside temp is a mild 8c, it's been raining all day, fans and air con on full - I'm beginning to wonder if the Q5 is the worst car I've ever had when it comes to clearing inside fog. I'd be very interested to know the views of this forum. Any definitive tips or advice for either a quick way to clear or a good way to prevent? Thanks, dave.