First, I want to apologize in advance if someone has posted a similiar topic before. I just came across this forum and have been overwhelmed with so much new information (that's a good thing, though) that I might have missed something. I am really used to making my candles in tins/jelly jars. However, I am testing a new jar and I found that on the 3rd burn, I couldn't achieve a FMP like I did on the 2nd burn. Is this normal? Here are some details on my tests: Wax: GB 464 Wicks tried: ECO 14 and ECO 16 (yes, I do have to try different wicks but am waiting for another shipment of samples to come in). FO and Amount: Pumpkin Souffle (CS) - 3%-6% Jar: 12 oz Square, 3.5 diam. - 10 oz of wax used First Candle Test Pumpkin Souffle, 3% FO, ECO 14 wick 1st Burn: after 3.5 hours, FMP not achieved, hang up in corners, HT okay - not great, some mushrooming 2nd Burn: after 3.5 hours, FMP achieved, no hang up, HT still okay, some mushrooming 3rd Burn: after 3.5 hours, same as 1st burn but alot of hang up in corners 4th Burn: after 3.5 hours, same as 1st burn Second Candle Test: Everything was the same except I tried 6% FO and it helped with HT. I stopped test burning for now until I could figure out the whole MP thing. I tried using the ECO 16 wick using both 3% and 6% FO and I had a FMP within 45 minutes, alot of soot, major mushrooming and flame was really high everytime. Needless to say, I am uncomfortable using that wick. So, aside from all those tests I have done so far, is there a reason why I would stop achieving a full MP after the 2nd burn? I have never experienced this with my other containers, so I'm thinking this jar is just a real bugger to wick? Please feel free to tell me if I am doing something wrong or if there is anything else I need to look out for in general. Thanks!