the torching process is deff. touchy, which is why its not really recommended until you have, AT LEAST, a few BHO runs under your belt.
The flame from your tourch never really touches the oil. You just move it back and forth to help pull some more bubbles out. It took me about 20 runs before I was comfortable with the flame. AND STILL, occasionally I get over zealous and start while the bubbles are too big (nothing like the scare of seeing a flame flash over on your oil!!!!)