I must first say on my first try, it did not work out ... Maybe I was not persistent enough. Then I switched to Canesten Nagelset without success. I just do not get the nail completely healthy. Then I got pregnant - could thus all the "chemical" things no longer take. So I thought - let's try the oil again. And lo and behold - even though the fungus had worsened again - all gone. At first I attached the nail polishes, disinfected and the oil applied (2 months) after 3 months then applied daily after showering without filing. It's really perfect, I carry the oil now still prophylactically on. No nail fungus more!