Tank too hot?

Everytime i vape
After 5 hits the tank gets warm and than warmer and warmer and get kind hot tbh
I vape mtl my hits are about 5 seconds long
And the e juicr is 80%vg.

I use eleaf istick powwr 80 watts
Tank is aspite cleito 120
Coil is 0.17 resistance and its says 100 to 120 watts
But i get good flavour at 70 watts
Am i abusing my mod or tank in some way?
Any tips?