Acetone is a powerful solvent that removes nail polish quickly and easily, but can be drying to the cuticles. Non-acetone polish removers contain ethyl acetate or nethyl ethyl keytone as their active ingredient. They are gentler on skin and were developed for use with nail extensions because acetone can cause extensions to become brittle and "lift." Non-acetone is less effective for removing nail polish than acetone. Acetone is also effective for removing oils and preparing the nails for polish. To use acetone safely on natural nails, use a cotton swab and avoid the cuticles.