From what I recall, you need to apply it twice a day and it needs to stay in your hair for 4 hours after application, so once after your morning shower, and then again before bed. I couldn't handle having shit in my hair all the time, so gave up after only a week or so.
And - if you stop, then hair loss just continues as before, so Rogain is for life.
I'd recommend just accepting what genetics have dealt you. It's tough at first, but that passes.
