That bright white light means you are boiling your glass. If you look at it after it makes that light, you'll probably see bubbles on the end of the rod. Pick off the end at that point and start with a clean end. My AUR-92s don't block that light, btw. It's only momentary, so I just try to avoid boiling the glass.
Oh, and I should say that I'm assuming you're using soft glass and not boro.
And I've heard that thing about turning down your torch, but I have no idea if it's true or not.
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Ellen
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