Remove the Stain
Remove any excess nail polish that is still found on the couch with paper towel.
Make a paste with a cup of baking soda and one or two ounces of water, or enough to make the baking soda into a paste.
Place the paste directly onto the stain and leave it on for 10 to 15 minutes.
Remove the paste with a dry cloth. If necessary, use a small amount of water to remove the paste, but quickly dry any water that remains with a hairdryer.
Repeat until the stain is removed.
Clean the Microfiber
Run a vacuum cleaner hose attachment over the area that you just cleaned to remove any debris that may be found on the material.
Pour 1/2 cup of powder laundry detergent onto the previously stained area.
Work the detergent into the fabric with a soft bristled brush.
Vacuum up all the detergent from the microfiber garment or sofa.