I was working in a booth at the sf car show one year and I saw these guys that were professional detailers , I aked how they got the cars so perfect and they all said the same thing 1 never touch your car with anything but a microfiber 2 pull the tag if it has one off immediatly 3 if you drop it its done use it to check the
oil or something ( i wash them and use them upstairs to clean the windows) 4 always use a new one one wet to wash and one to dry and polish .
Back in the day microfiber cloths were expensive like 10.00 a piece and the brand they all used was dragon fiber , these guys were the best at what they did and I have followed their advice and have been amazed at the results ..WD