This is a bumGenius newborn AIO. The good thing about little baby poo is that it doesn't stink, the bad thing is that it stains easily. By line drying my diapers I have avoided stains on all of Mikaela's diapers. Line drying can help get rid of old stains too although it may take several "sessions" to make a significant difference. It is very important to make sure the diapers are wet (so right out of the washer) when you hang them up.