The heat is on, but my hair is limp

So I played Ms Electrician yesterday and got the hot water hater running again...oh the bliss!
Only thing was my hair went all limp again. I had forgotten the old rule of washing your hair with cold water to make it shine. Seems I'm not rid of the cold showers after all - but at least now I know that after that cold blast, I can flick it on to hot and warm up again!