ORIGINAL: jonathanw
I use water deionisers from Ionic filters. The units remove virtually all contamination and if you go for the higher spec the water produced is pure enough to use to top up batteries. The result is stunning - car looks like it has just been polished after evry was. Deionisers are not cheap but imo are worth it. I wet the car with regular water, wash and spray off with deionised.
I used to think microfibres were a much better solution than a chamois. Then I discovered blowers. We have to large hairy German dogs (Leonbergers) and drying them when wet had been a problem until my wife bought a mains operated dog blower. It is very powerful and I use it to blow the water of my car after washing, Gets water out of all joins etc etc. Weel worth it. I feel sure my car enjoys its BJ as well. I now never use a chamois and use microfibres when Zymoling.