If the towel becomes too dirty, it will begin to “streak”. It is then time to wash the towel. This is easily done by just throwing the cloth into any washing machine and washing with any soap or detergent. The only restriction is to NEVER USE any type of FABRIC SOFTENER or BLEACH. The towel will treat the fabric softener as if it was dirt. It will try to store the tiny particles of the softener in the towel fibers. This will clog up the micro fibers and render the towel ineffective.
For best results always wash Microfiber products separate from other towels. They will attract lint in the wash water which can leave lint residues when next used.
You may also dry Microfiber cloths in any dryer, just be sure that the dryer does not dry at temperatures above 235 degrees F., as Microfiber will melt if heated too high.