well, nor have i actually. i just thought i'd best double check. my flexi tots have gone a bit bald, and on facebook i was told to contact tots about it, they said they reccommend non bio for there nappies coz of this eating o0f the bamboo or of course there own powder. i only use a desertspoon of powder in each wash it's not like i make a smoothie of the washing powder and pour it on. i did mention that don't most other countries mainly have bio, and i didn't get an answer. they are sending me a bag to send one of these bald flexi's back. shame, i do love them. the squishiest nappies i own!