Wow! That's considered to be clear? I must be missing something here or my expectations are too high for this glass stuff... I'm new to casting glass, I'm a bronze caster trying to add cast glass pieces to my work. But hey, I'm probably more technical support than what you will get from other sources. lol.
R&R does only recommend to use distilled water due to unknown alkalinity in your tap water.
So yes, I would start with that. Next, the guy told me to watch how long you steam and not over steam the wax out. He said better to smoke your neighbors out burning the wax out than trying to steam all of it out of the mold. He also said when driving off the moisture to stay around 300-350f for 3-4hre and ramp molds slowly, not more than about 150f to 200f per hour. Something else I learned, He said this investment should only be fired once. So after burnout, load the glass into the hot mold. Do not cool back to room temp and refire. Some of this schedule might not jive with what the glass guys recommend for their glass. As of now, I have not been overly impressed with the level of knowledge from these glass companies or their people. Seems, since people quit smoking, casting ashtrays has gone out of vogue and knowledge has greatly suffered. Make beads and you'll find all sorts of help. Just not for casting. That's how I ended up with 104coe glass for my project. :-/ I will say this, as I am still not having success either, I will be going with gafferglass for my next attempts. They are now here in the US so no more NZ nightmare shipping. Here's a link for ya.http://www.gafferglassusa.com/index.php?route=product/category&path=88_61
Please do let me know how you make out. I'm in the same boat as you on this one. Maybe we can help each other out.