so, I’ve been trying to narrow down the milk spills and I just found that my duckbill isn’t draining. it does not happen every time and I rotate bills, but this session, I put 2 different ones in and it back flowed… what might cause it?
so, I’ve been trying to narrow down the milk spills and I just found that my duckbill isn’t draining. it does not happen every time and I rotate bills, but this session, I put 2 different ones in and it back flowed… what might cause it?