Begin by putting a small amount of nail polish remover (acetone) on a white paper towel and lightly patting the nail polish on the carpet. Wait for nail polish to soften, then follow-up by patting the nail polish on the carpet with a dry paper towel. Alternate back and forth between patting the nail polish with a paper towel containing nail polish remover, and patting with a dry paper towel. Do not rub the nail polish aggressively, this will push it further down into the carpet. Repeat until all nail polish is removed. If the nail polish does not come out, please call us. We can try other chemicals and heavy-duty vacuum suction, or simply cut the stain out and professionally patch it.