When I know I am going to use a bunch of microfibers, such as with a rinseless wash, I have a bucket of hot water nearby filled with a scoop of OxyClean well mixed. After washing a panel I toss the microfiber towel in the bucket. When finished, I mix and agitate the towels and let them sit in the OkyClean for an hour or so - then in the washing machine they go. The towels come out better and cleaner than when I don't let them soak.