Been having a lot of issues recently, recently have decided to move away from wooden wicks and use ECO and TCR wicks. But since then I have experienced a lot of tunneling.
Recently used some ECO 16 on a 85mm diameter container and it kept tunneling. The same happen using ECO 12 on a 74mm diameter container.
This was using no fragrance, and using Ecosoya CB Advance. Am I using the wrong wicks?