Although I am on several different forums for different things (sport bikes, sport bikes, old trucks, etc.), I don't think that I have come this close to spitting beer out of my nose for a long time.
As for the poster that washes the shop rags, then the dog bed, then the coveralls? Really? you aren't married are you? I can't even wash the dog bed without the wife freaking out and I have to do 3 cycles afterwards to clean it out.
I use the red shop towels for mild stuff, the Scott's towels for that stuff that just needs to be disposed of with the utmost of care (while wearing nitral gloves...), and if neither of those seem up to the task, I dig in my 30 gallon barrel of old t-shirts, socks, towels, and sheets (there are no underwear in there...that is just wrong) to find something that will work.
I have a couple of stacks of red shop rags and microfibre cloths in various stages of "dirty" that I can pick from. I am still working on a new bag of red rags and when I get a suitable stack of rags to wash, I will decide whether to wash or throw away.