Trying out the Aspire ETS BDC device on a Kanger Evod VV device as my luck with my Mini Protank II was eating up kanger coils in days. Wanted to be able to increase voltage without burning taste. While the Aspire heads allow this they taste really bad at start. I tried switching to a 2nd head and yes I rinsed with hot water and allowed it to dry and did the primer puff thing and the taste got better but that weird off taste is still lingering ever so slightly. Should I keep trying different heads? Does anyone else have the same problem? I am using 50/50 12mg Fire and Ice juice from Zeus. Comments or suggestions. Thanks