hello, you could try wiping you fore head down with liquid tcp and cotton wool pads befor getting in the shower/bath. It is best to do it before you shower/bath as it smells bad.
You could also wipe you for head down with tcp before you went to bed, if you dont mind the smell that much. Any hows I guarntee tcp liquid does work it just pongs a bit!!!!!!!!
ps I nearly forgot to say how painfull liquid tcp can be on the skin, basically it can burn a little, but It wont do any harmfull damage. To counter act this you could always put on a light mouistriser before wiping down you fore head, as It will take most of the sting away.