Give the inside of car glass a good clean with a decent glass cleaner if you havent already. This improved mine no end and stopped the misting up all the time. Also if you have a lot of moisture in car from wet clothes,damp dog etc one of the dehumidifiers on sale from most diy shops does wonders. I redry the packs in oven using its residual heat after we have finished cooking as well so they can last a long time.Edited by: HoneyMonster