Bella Boo, I got those color catchers about a year or so ago. They really do work. I never put them in the dryer, I closepin them to a hanger above the washer for use the next time. Amazing to watch them get darker after each wash.
I got mine at JoAnn's but last time I went to replace them, JoAnn's wasn't carrying them anymore. Glad to know that our Walmart might have them.
Haven't seen any signs of fabric returning to our WM yet. Hope... hope... hope!