My DS had it quite bad and he started going bald from it at 4mnths? Not sure if this would have happened anyway since he is my first lol. I tried a few things and eventually what worked was putting a bicarbonate paste on his scalp at start of bath and then wash off at end of bath. After a few days it was gone. I also brushed his hair with a soft tooth brush lol (didn't have any baby brushes!)

He know has beautiful long hair lol - and possibly already needs a hair cut