I admit,I just chuck my daughters stuff in the machine with mine and my husbands and put it on a quick 30minute cycle at 30 degrees. But saw an ad earlier for anti-bacterial soap powder which got me thinking. Day to day I suppose 30 is fine but for the washing that's a result of a leaking nappy and covered in pee and poo 30 degrees really isn't hot enough is it? What should I be doing with it?