That very possibly could have been the problem as that
juice is VERY heavy with menthol and "some" vapers have had issues with it
juice Contains:
PG- almost waterlike consistency- gives TH, Lung Hit and enhances flavor
VG- very thick and gives vapor
Nicotine- gives TH, Lung Hit and our need for nicotine
Flavor- that's kinda obvious
They menthol burst was prolly made with menthol from menthol crystals and even after mixing they have a tendency to "separate"- I use them myself.
Because all the different ingredients are a diff viscosity they all tend to either settle or rise to the top. I had one friend who's juices, at the end of the bottle, were always HORRIBLE. Turns out he wasn't shaking them before using. He now shakes them and they're good to the last drop. Also remember to drink lottsa water. The vapor comes from our bodies and not the juice. PG and more so VG "trap" the moisture in our mouth, throat and lungs and thus the vapor. Dehydration is an issue with
vaping and I drink 2 large glasses of water in the a.m. and 2 liters per day.
Good Luck, Vapoor.
I never shook the bottle ever and it was a big x2 size....