Washed my car yesterday and noticed that my WW towels just aren't picking water up like before. I've actually noticed this over the last several washes, but yesterday was the worst thus far. The towels are leaving a lot of streaks and are just pushing the water around. I've had them (2) since March and use them every one to two weeks. They are always washed with other microfiber and with a detergent made for microfibers. Occasionally, I've run white vinegar through the extra rinse cycle. Perhaps it's just time for some new ones??? Thanks.