I thought it was ba. I usually boil water then pour the water in a bowl . Then I insert 2 18g pins through the stopper for ventilation and set the bottle in the boiling water. I swirl it around and repeat the boiling water a couple times to get the temp up and evaporate some of the ba...this seems to work well, no knots, no pain...I also suggest warming the oil prior to injection.
cheers