How To Get Grease Stains Out Of Colored Dinner Napkins

Here are some steps you can try to remove grease stains from colored dinner napkins:
Blot the grease with a white paper towel until it's clean.
Cover the stain with baking soda and let it sit for at least an hour, or even overnight.
Brush off any excess baking soda.
Apply dish soap and rub it in.
Wash the napkin in the washing machine.
Use a color-safe laundry booster.
Let the napkin air dry.
You can also try making a paste of baking soda and warm water to pretreat the stain before washing. Baking soda can help remove stains without damaging the fabric.
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Brush off the excess, then apply Dawn dishwashing liquid directly to the stain and dab (don't rub) that in. Launder in the warmest water allowable for the particular fiber that your linens are made of. Repeat the process if any of the stain is left after the first try."