So I got my protank last tuesday and I love it but after the first day my juice started tasting burnt so I replaced the coil (saving the old one) and it was fine again. Then today I as vaping my diy liquid and it all of a sudden lost all its flavor, I wasn't chain vaping or doing it too fast so it shouldn't have burnt out and its a fairly new coil (wednesday), I can't quite describe it, it's not burnt but it tastes completely muted, same liquid same coil so what could it be?