I know next to nothing about the use of IT, but heres a suggestion. Instead of making a new thread every day about IT, it might be a better option to just keep IT discussion in one of your previously made threads.
Now this is something we agree on. . .
Mike, anytime you ask the same question over and over you end up cutting yourself off. There are two solutions however, given your concern; in the first instance you need to simply obtain more material on thread work. There are videos & books out there that will help answer this and other questions you may have when it comes to reflection. I know for fact that I've posted here and at E insight as to how to overcome this particular problem (I'm not repeating it here because some folks think I've exposed something).
The other thing you need to do is not just be patient for someone to respond (not everyone checks in here daily) but likewise, keep your eye peeled for other threads that will pop-up every now and then, pertaining to the same topic or at least, insights relating to IT type work.
I will point out a couple of things though, when it comes to the problem you seem to be having, the chief issue being that you aren't aware of lighting and not using common sense when you perform the effects in question. Fluorescent lighting for an example, really isn't a friend to the types of threads used in IT work, nor is black light. Part of having any effect or tool is learning the weaknesses and how to overcome them BY EXPERIENCE and EXPERIMENTATION vs. having it spelled out for you constantly. This is how you will learn more about getting creative when it comes to use of such things.
The other thing to realize is that you will be far more aware of the thread (in this case) than others. For starters, you know it's there and too, you are not positioned in a way to not see the gimmick/thread. What you see isn't what the audience will witness.
I had the hardest problem trusting Black Art because I COULD SEE THINGS when I was on stage and wasn't understanding how it was so much less obvious to persons standing 10 ft from a prop on the audience side of things; it was truly bewildering and yet, the same is true with most of magic. Sometimes we just forget this because part of us wants to enjoy the effect and the mystery more than experiencing the work from behind the curtain, as they say. This is why I personally avoid learning certain types of magic and technique; because I want to retain the mystery vs. mastery.
Spend a few days setting threads and stepping away from them so you can study reflection and angles under different lighting, distance of range, etc. While this means eating up a lot of thread, you must understand that such is part of the learning curve.
Best of luck!