Use acetone. You can get it at a beauty supply or drug store. Pour some in a little glass bowl and soak your fingertips in it for about 15 minutes. Use cotton balls wet with acetone and start rubbing. It is difficult to get off. After yu have it off use some lanolin and rub into your hands and nails and cuticles. Leave it on for about 5 minutes. Then wwash your hands good with a mild soap. That is about the least damage to your own nails you will find. A friend of mine is a hairdresser and she does it this way.