Hey all. Thanks for all of the input on the iolite. I just got one recently and thought i would share my experience, since I've found so much great info in this thread;
i bought this thing, used it for a day, hated it, posted it on craigslist and started looking for a different portable option. Then i found this thread, tweaked my technique, removed the craigslist ad, and have been slowly starting to love it. The tip that helped me the most is to make sure the herb is DRY - this is key and probably wouldn't have occurred to me if I didn't find this thread. I'm used to using moist herb with my other vaporizers. From there, I started experimenting with packing; most people seem to have the best results with smaller bowls, but i've found that if i pack it full(but loose), i get the best results. Seems that this allows for more material exposed to the pin and better conductivity, but with good airflow, creating a richer vapor(in my experience anyway). At this point, I was happy with my purchase, and although I wish I could get a few more degrees out of it, it would work as a portable(this thing is awesome for the car, btw). Wanting the best performance, I decided to head on down to my local shop and pick up an optimizer to try out. The first time i tried it, it improved the experience 3-fold. i took my normal slow, steady draw, but this time i got a pretty thick vapor that actually choked me and came out a thick cloud. Also, the unit seemed much hotter to the touch - borderline uncomfortable. I had 2 bowls like this and went to bed. Woke up the next morning and was excited about the thick clouds i was getting off of the iolite the night before, so immediately loaded a bowl, but could hardly get a visible vapor. This happened bowl after bowl and all i could get was a thin vapor - visible, but thin. Also, the unit was not feeling as hot at this point, so I started playing with an IR thermometer, but that didn't seem to be giving an accurate reading(170f - which it was obviously hotter). After about 8 bowls, and alot of frustration, I realized that I had been packing much smaller bowls to compensate for the volume of space that was now taken up by the optimizer. I decided to pack my normal full size bowl, heated it for a few cycles, and wham-o! milk! I loaded another just to be sure, and it has been the same every time now. love it!
so, for me, best results come from an optimizer, and a very loosely packed full bowl with no other mods other than keeping it clean, which is also pretty crucial. The best way I've found to clean the screen is to "flash" it in and out of the flame of a butane torch a couple of times. Screen is as good as new in 1-2 seconds.
thanks again for all the tips and tricks everyone!