Menthol Ice

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?