Tested by Nelle, or this time not so much. She just didn't wanted to get near it, I tried with cookies,..., nope, this pictures was the best. Luckely the Thread Heaven wanted to pose, would be something if he didn't wanted too.
Thread Heaven it is then, it's a little blue box with some wax in it. It looks like nothing, but for Kreinik and metallic threads it's a musthave to me. I haven't tried it on other threads yet, but didn't had to use it for those yet.