I have the same problem. First fill, bad taste, shake it up, bad taste goes away. Lead me to believe it was a fill issue. 5 minutes of normal
vaping, bad taste again. Absolutely no way in hell I used up 2ml in 5 minutes, that'd give me a headache. Gave it a Taryn spin,
juice came out, better taste. Another few puffs, bad taste again.
I'm the kind of person who'll vape for a minute, then set it down and wait 5 minutes, puff once every couple minutes after that, set it down for a half hour, repeat.
Even letting it sit battery side down in between vapes doesn't seem to cover it. A full fill, letting it drip through the battery end into a bottle til it stops, wiping it off and putting it back on the ego is the only thing that seems to stop the bad taste, which totally defeats the purpose of a carto, which is to leave it on the damn battery ALL DAY.
Note: Just took another vape after letting it sit battery side down for 5 minutes. Result: great vapor, still bad taste, but not as potent. Shook it up after that. Result: exact same. Not gonna waste any more money on these cartos unless someone comes up with a fix.