I was prescribed "Tretinoin" 0.025% It says "Apply to the effected area before bedtime" When it says "effected" does it mean the whole face, or just the zits? Also, when I apply it, do I leave the cream to a visible "WHITE" color or keep on rubbing until the white is gone? Also, can I use any other acne treatments, like clearsil daily wash? Something that just washes my face in the morning, then I use it at night then I apply the cream.