my 3 month old son has very bad cradle cap. it's hard yellow crust at the top of his scalp and sometimes it even smell. i rub baby oil on his scalp everyday and wash his hair once every 2 days but it doesn't seem to improve at all. sometimes the old crush fall off and new ones are formed. does anyone has the same problem? if so, may i asked what was your solution for it and how long does it take before it vanished totally?