I'm all out of spray n wash. Would it work to use resolve carpet stain remover on a piece of cotton clothing?

I wouldn't ever use that on my clothes but I guess you could test it on a piece underneath by the hem to make sure it doesn't ruin the color. Instead you could take your laundry detergent and a toothbrush and rub the detergent into the stain and let it sit for 15 or 20 minutes and then wash it. That works really well for me! Also if you have any Oxyclean around the house read the laundering instructions and use that for your stains. It is literally a miracle cleaner! Good luck!