As I have mentioned here and there, I am no scientist/chemist.  At least in chat culture, I have noticed a joking attitude towards skatole as if is not a real issue.  Hopefully others will comment.  Also I have heard others praise DMT resin.

Now, my original reference (not handy but retrievable) was a short article and/or letter in an Entheogen Review issue.  Also I believe in the other forum I referenced a wikipedia link.

I am a fanatic believer that investing in a Vaporgenie or even Glass Vaporgenie pipe solves these issues.  When used correctly, resin is not an issue, burning is not an issue.  Every molecule is vaporized and any pipe deposits are re-creystallized DMT and/or plant or herb oils.

Problem solved because there is no problem, . . . even if perhaps it is not a problem in the first place.

So, needless to say, I don't really know, but I sincerely encourage getting rid of the bulb, investing in a GVG or at least using a bong or glass pipe with some herb (not mj) and/or ash on top of screens.  Always endeavor to vaporize and not burn as much as possible.  It's worth taking extra time at the beginning to let it very slowly melt then bubble into vapor.

I hope this helps and am confident you will get more/better answers.  You're on the right track to post questions and health/safety concerns.

Peace & Love