I do exactly the same.I wash my microfiber towels separately in cold wash and I use All Free/Clear detergent. Then I let them air dry.
I like your system. I was wondering what to do with discolored or older microfiber towels. I think they all go to areas that are not paint or matte finish. I plan to purchase new ones for the Challenger. I found a starter kit on Autogeek with new towels and the microfiber wash. Thanks!I am hard on my microfibers, but I run through them. I usually hand wash them in the kitchen sink, if they are lightly soiled or have little wax or pollen residue. Newer ones get washed & rinsed after first use. If they get any discoloration where they picked up something from cleaning, if I can't get rid of the discoloration, they are demoted.
They are good for inside doors and glass. Wipe down of seats, they are out of the paint /finish service.
Next stop is to Dodge Ram & Jeep service. Lower areas trims, Chrome bumpers, steering stabilizer boots, shock boots, shocks and moving on down to under the hood cleaning service and last stop oil change service.
They rotate through boxes where i have graded them and depending how many times they have been washed.
interesting I hang mine up to air dry for a day outside. They may pick up pollen then, so older ones are generally not in paint finish service at that point.
Touch screens get new ones about every time. Challenger & Gladiator get new ones on exterior every time. Mini does too.
You can still use them but with limited uses. If you use them for coating leveling immediately throw them in a bucket of diluted high alkaline cleaner and wash separately. You can then designate them for some interior uses or around the engine bay. After engine bay use I usually toss them because that's usually one of the dirtier areas with all the oil and grease.I do exactly the same.
I also wash my microfiber wash mitts separate from the microfiber towels. Still use All Free/Clear and no fabric softener.
BTW ... I've read that if you use the real thing ceramic coating products that it's best to not use those towels on your paint in the future as the product can dry into hard crystals. Can you reuse microfiber towels after ceramic coating?