Remove nail polish from your carpet while it's still wet for best results. Dried nail polish is more difficult to remove. You need a butter knife, clean dry rags, paper towels, nail polish remover and dish soap.
Remove the excess polish
Check to see if the polish is still wet or has already dried. If it's dry, use the dull edge of the butter knife and flick away the excess polish. If it's still wet, use a dry rag to blot any excess polish away. Use gentle pressure and avoid scrubbing, which spreads the stain.
Apply nail polish remover
Test the nail polish remover in an inconspicuous spot on the carpet. Avoid using oily polish removers that cause a grease stain on the carpet. Apply a small amount to a clean rag and blot the stain. Continue applying the remover to clean spots on the towel and blotting until most of the polish is gone. Don't saturate the carpet to prevent the solvent from dissolving the backing.
Use dilute detergent
Put a few drops of dish detergent in a bowl of water. Mix well, and apply it to the stain with a cloth dipped in the detergent solution. Blot with a paper towel to remove any remaining polish and the polish remover. Repeat until there are no more traces of the polish. Apply clear water and blot dry to remove any detergent. Use paper towels to absorb as much moisture as possible.