Thrush - how to wash nappies?

I think my baby may have nappy thrush, because when I got some cream her nappy rash went away really quickly - but what do I need to do so that the nappies don't keep reinfecting her? Anything special?

I'd suggest the same as Bobbie and either using an inwash treatment or washing your nappies in hot water with a little tea tree oil to clear out any infection. My son had a bacterial infection on his bottom once (started as a teething rash) and I kept him in disposables until it was all cleared up, just to elimiate the risk of reinfecting his lovely cloth nappies again.