Get Stains Out of Dinner Linens
For the cup towels/dish towels, which I’m sure are 100 percent cotton, you should allow them to soak in a solution of hot water and chlorine bleach. Fill your washer with hot water and add 1/2 cup chlorine bleach and allow to washer to agitate for a few seconds to mix thoroughly. Add the towels and allow them to soak for 30 minutes and wash as usual. This will help to remove stains, disinfect the towels and whiten them.
For the tablecloths, which may have some synthetic fibers (polyester) use oxygen-based bleach (OxiClean, Clorox 2, Country Save Bleach, Purex 2 Color Safe Bleach ) . Since you have so many cloths, you will need to use the bathtub or clean 3 or 4 at a time in the washer. Fill the tub with warm water and add 1 cup of oxygen bleach. Submerge the cloths and allow to soak for 24 hours. Check for stains and if they are still there, repeat the process. Then wash as usual, adding 1 cup of white distilled vinegar to the rinse cycle to help brighten and whiten. If they are really dingy and yellowed, you may need to use a color remover to restore the whiteness.