I have a question about applying minoxidil. The average person generally has a certain place say around the crown of their head that they will apply the whole 1 ML to. Well my hair is just plain thin all over. Would I have to use more than one milliliter to place it over the whole surface of my scalp? because from what I understand that 1 milliliter is supposed to be concentrated on one spot, so wouldn't it be less effective if I were to use only one milliliter to spread out over the whole area of my large melon?