You can wash them with other natural (cotton, bamboo, hemp) diapers that need to be prepped, not with MF. If you don't have any other diapers to prep just wash them with some towels.
Diagnosed with PCOS March '10 - Started 1000mg of Metformin After 3 unsuccessful Clomid cycles, FSH+Ovidril+IUI+Progesterone=BFP!
Time to make Emilie a big sister!
May '16 2.0: Letrozole+FSH+Menopur+Ovidril+IUI+Progesterone=BFP! first beta-45.44, second beta-148
Re: Prepping fitteds
Diagnosed with PCOS March '10 - Started 1000mg of Metformin

After 3 unsuccessful Clomid cycles, FSH+Ovidril+IUI+Progesterone=BFP!
Time to make Emilie a big sister!
May '16 2.0: Letrozole+FSH+Menopur+Ovidril+IUI+Progesterone=BFP! first beta-45.44, second beta-148
Ok that's sort of what I was thinking. I've already done the prefolds, so I guess I'll just throw them in with the next load of towels.
Thanks!