If you suspect you have nail greenies, celebrity manicurist Roxanne Campbell says it’s important to keep the affected nails dry and free from products to allow them to ‘air out’ and eventually grow out naturally. Humprhey says that it could take around two to three months to grow out nail greenies, depending on the placement. Greenies near the cuticle, for example, will take longer. This is why it’s important to gently remove any BIAB or other nail enhancements like soft and hard gels or acrylic. Keeping nails as bare as possible is key, confirms Humphrey, who explains that oxygen helps to kill the bacteria. In most cases, using ‘breathable’ nail polishes, which are water-permeable, is fine.