I ordered a Melo and got it in last tuesday, however it keeps spitting my juice back out at me. I've tried different coils, I've cleaned it, etc. However I'm unsure what PG/VG ratio my juice is, as I typically buy it from a smoke shop near me that started carrying juices, and im wondering if that could be why? I'd be bummed if the first sub tank I've bought is a lemon.