could be either. the 400mg/ml test has from what I recall lab tested to as low as 325 and as high as 465 from different labs. To just get past 300 anyhow, the solvent levels have to be pretty high. Really high if its not an ethyl oleate based oil mix. So its definitely possible you are just having a sort of allergic reaction to the amount of solvent in it, but its also possible there's something wrong with the gear.