I have just finished my 4 hour burn.
The first 2 1/2 hours were great, the scent thrown was strong and the burn pool was pretty even. It started to struggle after 3 hours were I found the flame looked gradually smaller and the burn pool was then effected and created a slight crater. I am using TCR wicks from Supplies for Candles. I also used 10% FO in my rapeseed blend. I have been reading through other comments with similar problems and I think my problem is my FO percentage is too high?
I am going to do a burn test with just wax and my TCR wicks, no FO.
Also a separate test with 6% FO.
Any help would be appreciated !!