I do enlarge the wick openings and once they get working well the taste never comes back so it definitely could be primer. I will try washing and dry burning the wick on a new one and remove the bottom seal.
What is your recommendation on removing buildup from the coil? I'm thinking of getting a small ultra sonic cleaner.
Many thanks.
Here's the way I clean my CE2:
- remove the seal and the tube.
- wash/rinse the wick in distilled water then dry by patting the wicks with a paper towel.
- dry burn the coil (5 sec on, 5 sec off) until there is no more smoke coming from it and it looks clean. If I have a lot of build up I may use a toothbrush after some dry-burning.
- rinse the coil by squirting some distilled water from a syringe
- let sit overnight to dry, re-assemble, fill and vape.
I find that this will remove all build up from the coil and I have never used an ultrasonic cleaner, but it may work. If you ever get the ultrasonic cleaner I'd like to hear the results.