I was excited to receive my new eroll today, along with 3 100% vg sample juices. Smelling the juices from the bottle, the mango smelled medicinal. The cola and caramel smelled delicious. So I filled the eroll cartridge with the cola, and it was nasty, metallic tasting. I put a little of the cola juice in my ego t, and it tasted great, so doesn't seem to be a problem with the juice. I tried a different atomizer in the eroll, and no difference. Any ideas to try and make this eroll vapable?