I have been watching this thread from the start. I don't know.. it's a great product and I love it.
I use the same 2 border less gray towels for my application. Original towels for a little over a year. I am halfway through my second 16 oz bottle. When I am done I spray them pretty heavily with APC and let them soak while I finish up the detail (windows, trim, tires). Then, light spray of APC again, and rub them together to agitate them. Then run them under warm water and throughly rinsing them. Ring rinse repeat until I feel that they have been rinsed and got all the product out. Takes me maybe 5-7 minutes for both towels.
Still going strong and soaking up water.
I wouldn't give up on it if you like how the product works for your vehicle.