Planning to use Rain X for the first time. Done a little searching here but unclear whether ok to use on wing mirrors? I’ve been having some issues with droplets making the mirrors useless and having to carry a chamois. How long does Rain x take to dry in Temps below 10 C? Getting a lot of rain at the moment with only short dry spells. What type of cloth do you use to apply it and is Autoglym shampoo sufficient to clean the windows before application? Sorry for all the questions but Ltd info on the bottle and I haven’t used it on any of my cars. Any advice appreciated. TIA.