Hopefully I'm understanding you. What I gather is that you bought some
eliquid at a higher nic level than the stores sample (by the way many if not most stores put out 0 nic or 3 nic samplers) and the higher level of nic made it taste bad.
So, I assume you cleaned out your tank and then put in a different eliquid but are still tasting the old?
If that is right, replace the coil and clean out the tank thoroughly.
Depending on the tank there are some that I need to remove the glass tube of the tank so that the vodka bath that I soak them in overnight can get to all the little parts like the orings etc else the taste of the last liquid might linger on for weeks depending what the last liquid was (space jam lingers and I now only will put it in one storage bottle and use one tank for it as I can't get rid of it no matter what for some reason). But in general replacing the coil and taking the tank apart completely and soaking in a vodka soak for overnight up to several days usually does the trick to rid the last flavor out of the tank.
