I use 6006 with eco 8 wicks, 8% FO in 3" tins. The only time I have ever had a problem with the wicks going out was when I used Cinnamon Buns FO from CS. Could not get that one to stay lite at all. Wick are from CS and wax from Peaks. Sounds like somehow the viscosity of your wax is off and causing your wicks to go out. I would double check your blending combination to make sure you didnt change that by accident. Both these waxes should be able to hold 10% FO.