Well here is my take....
I use the cold cream and wash cloths as part of my routine. I bought specific cheap washclothes for the job. They are all white.
When they get washed I put them in with hubby's undershirts and undies (this is my hot water and bleach load). This load is generally smaller so as I load the machine I get out the Spray-n-wash and start spraying items before they get tossed in.
When they come out, they are clean. I mean they are reallllly clean. But they may not be un-stained. But thats ok, thats why I bought cheap cloths for the specific purpose. I do the same for my hair coloring towels, except they are dark. not white.