u I have accidentally come across something I think you’ll like. I have tried using Cif shower cleaner on my side windows. If you look at the photo, you can see where I used it. It is cheap and easy to apply. I also tried it on the front windscreen, but the wipers removed it almost as soon as it was applied. I used to go round the car and squeegee each window before driving off. It was a chore, but I didn’t want to scratch the paintwork. This offers the best of both worlds. Hugh Rogers Martyn Knowles responds: My only word of caution about using domestic cleaning products on your car is to make sure that they don’t damage your bodywork. Many domestic cleaners contain quite harsh and caustic chemicals such as bleach and ammonia, which could damage paintwork and rubber trim items. If possible, test them on an inconspicuous area before potentially leaving yourself with a huge repair bill.