Hi Ganna, give the fretboard a good going over with fine steel wool first, wipe off with a clean cloth then go over the fretboard with the Dingowax with a microfibre cloth thoroughly rub it into the fretboard. You can do this several times over a period till you are ready to string the axe up. The more coats will soak in better. Don't be shy with it. The wax will protect the fretboard from string abuse