FL I'm not sure, I've lost count...I washed them twice before using them and since then maybe 10-15 times?

Hotl it was a bit of both I believe. He'd leak either because nappy was too full or because I'd not clipped it properly. So maybe sometimes for some reason the nappy doesn't soak up the wee. Why wouldn't it though? I can't think of what I could be doing wrong...