text: Hello, I'm looking for some advice please.
  
  I'm doing some test burning on some 30cl candles (see below) but having issues with flickering. Below is a 30cl coconut soy wax / 10% FO / CL14 wick tester. Why is it flickering? I've tried wicking down to CL12 (in a 8% FO) tester but it's tunnelling badly and still flickering. I've tried some other FO testers with CL12 wicks and they don't flicker but do tunnel badly. Should I change wick? If so what size / type would you recommend?
  
  Thank you!