Hi,

I mainly use PUL covers, and I find that they go about 3-4 nappies (wet) before washing. Sometimes I have 2 on the go, and sort of air them between uses. Basically I wash 2 out of 3 every 2 days. If that makes sense.
I used to have to wash them every time they got breastfeed poo on them, what a mess!

Fi