The present invention provides methods for treating onychomycosis. In certain embodiments, the methods comprise comprising applying a pharmaceutically acceptable formulation containing 10% efinaconazole once a day for a treatment period of at least 36 weeks to the treatment area of an onychomycosis patient (a) without debriding the nail or nail-associated tissue initially or during the treatment period and/or (b) without removing the formulation from the treatment area during the treatment period. In certain embodiments, the formulation also comprises, water, cyclomethicone, diisopropyl adipate, alcohol, C12-15 alkyl lactate, butylated hydroxytoluene, citric acid anhydrous, and disodium edetate.