Car Clinic: How can I stop my car windscreen from misting up?

Car Clinic: How can I stop my car windscreen misting up?

Your motoring problems solved

Car Clinic: How can I stop my car windscreen from misting up?

Q. The windscreen in my Vauxhall Corsa mists up badly in damp weather and takes ages to clear. What can I do about it?

ML, Wotton-under-Edge, Gloucestershire

Browse NEW or USED cars for sale on


A. Condensation sticks to the interior glass, and then layers of dust build up, making any misting hard to clear. So start by cleaning the windscreen on the inside using a specialist product such as Autoglym Fast Glass (£7.79 for 500ml at

Next, try Rain-X Anti-Fog (£6.99 for 200ml at, or something similar. It acts like a polish to stop dust and debris sticking to the screen, inhibiting further misting.

This assumes, of course, that you haven’t got water ingress, either around the screen or elsewhere in the car, which could be causing the problem or adding to it.

Products: Glass cleaners and glass sealant with added sparkle

Sunday Times Driving Car Clinic: Dave Pollard, car accessory advice
Dave Pollard has written several Haynes manuals and has tested just about every car-related accessory — read more from Dave here.

Email your question to or write to Car Clinic, Driving, The Sunday Times, 1 London Bridge Street, London, SE1 9GF, with a daytime phone number, your address and as much detail about your car as possible. We can’t reply in person, so don’t send original documents or SAEs. Advice is given without legal responsibility.