When are carts bad? (VaporNine)

[nonlinearedits]

I've been smoking VaporNine's for the past 3 months (love them by the way) but I'm having a hard time figuring out when the carts are bad... they never stop vaping. But I notice a taste difference, although sometimes 5 or 6 puffs into a new cart I can taste a sort of chemical flavor so I don't know if it's in my head or just the general taste of the cart.

Also, is it bad if I'm vaping a shot cart? Are there harmful chemicals being emitted from anything burning in the cart/atomizer?

 

[mooreted]

When mine start to taste off or draw hard or look brown, I toss them and grab a new one. They usually last me a couple of weeks, but I have had them go bad in a week's time.

 

[Tiesel]

Its always been pretty easy for me to tell when mine go bad, everything that mooreted said is usually what happens. They last anywhere from 5 days to 2 weeks with me but when they start acting up I toss em. They are so cheap there is no sense not to just toss it and get a great vape with a new one.

 

[MattyT]

Ditto to mooreted and Tiesel. As far as the chemical taste 5 or 6 puffs into a new carto is concerned, that could be something with the juice and not necessarily the carto. Are these prefilled carts? Do you only notice that happening with a certain flavor?