hi , first time on here, and need a bit of help, just baught a smok stick wich included the tank, but the coil burns my usual brand of liquid from time to time, i need to buy some new coils , and not needing to buy more liquid (80/20) for quite some time should i go to a lower ohm or a higher ? Note the tank is Tfv8 and came standard with a pre installed coil!