Menthol Ice

Hi!
I’m trying to get that cold feeling like in Halo’s Menthol Ice.
It seems that not many attempts have been made to clone this one.

Any idea how i can do this?

So far I tried:
3% Cotton Candy
2,5% Koolada 10% (TPA)
2% Menthol (TPA)

6 drops of super sweet
10 drops of ethyl Vanillin

Tastes pretty nasty. No cool vape but quite a lot of menthol taste.
Straight after a quick shake, I’ll try again tomorrow.

Do I need a lot more of Koolada?