Definitely stay on Fin unless you are getting sides from it. Have you considered using Rogaine foam instead of regular Minox? I've had a lot of success with it, and not only that but it also makes my thin, fine hair look better during the day when I apply it in the morning. For me, it would usually take about 30-45 min for Minox to dry but with the Foam it only takes less than 10 minutes.