I specifically asked and was told it was fine to keep using cloth. My understanding is that its specifically pooey nappies that are the problem. I just made sure I washed that day's nappies at the end of the day, rather than maybe every second day, and then lay them over the line so they got lots of lovely sunshine. Just don't forget to wash your hands really thoroughly after putting them in the machine.

I've done this for all three of my girls and never had a problem