The first thing you should do when you get a new micro fibre towel is to wash and dry it. Most towels are washed several times by the manufacturer to remove excess dye and any contaminants from the air and machinery. Unfortunately, this leaves the towel looking limp and used. So, manufacturers then "size" the towel to make it look more attractive and new again. This "sizing" process uses a starch and silicone mixture that will scratch and contaminate your paint finish. There will also be a number of loose threads that, while they cause no harm, can be annoying the first time you use the towel.
Some towel manufacturer’s use a chemical to make the fabric soft, theses chemicals should be removed by washing It is very important to was new towels before they are used for the first time.
Only use liquid detergents; never use dry detergents as many times the granules do not fully dissolve and become trapped in the towel. This can cause scratching of the surface you are cleaning. (See also Micro fibre Care)