My wife leaves her car outside, and when the weather changes from cold to warm and vice versa she gets a lot of condensation on the inside of her windscreen. These have proved to be really useful and efficient in getting rid of the water and not wasting Kleenex tissues. Also a recently bought acquisition of a halogen oven, and again these are good after having cleaned the bowl to just wipe round and dry it out totally. They don't cost the earth, but are extremely efficient in what they do. A tip here is to wash them first because they do have some "factory finish" when they arrive.