Ok, I just got my first cartos in yesterday. I got them blank so I could add my own juice. I put one kind of juice in one and it worked great. I went to try another type of juice and am not sure I put enough in the carto.. when I went to take a vape I tasted nothing but burnt filler. I thought putting more juice in would fix it. It didn't. Have I just ruined that carto? Once you 'burn' them are they always going to taste burnt or if I get enough juice in there will it be OK? 
