Another microfiber tip; wash microfiber with no other cloths. I keep two five gallon buckets in my garage to keep cotton and microfiber separate fo r washing. I also rinse twice in the washing machine. Dry microfiber on delicate cycle as high heat tends to melt the micro threads.
From my professional auto detailing training you always apply with 100% cotton terry cloths. Pep boys and other auto parts stores sell these for $15 for a bag of 20. Cotton blend has hard polyester threads and cause suirls and light scratching.
Microfiber is used for buffing, not applying.
I buy chemical guys gold brand microfiber off eBay. Best microfiber towels ever made.