DS is 11 months and a very prolific pooer. 4 - 7 dirty nappies a day is the norm. He often gets nappy rash although he is changed constantly. It doen't normally bother him but today it's been very sore. I've tried Metanium which seems to work best but doen't clear it up completely; Sudocreme which I've stopped using c'os it stings him; and bepanthen which is pretty useless. HELP