I usually just mix with bac and never have problems. This is probably a bad batch. My Korean gluta has never ended up looking like that after mixing.
I have two reconstituted 600mg glutathione vials. One was mixed with 2ml of hospira and the other with 3ml. The 2ml version shows more leftover particles than the 3ml one. Both had some residue right after mixing, but it became much worse after sitting in the fridge overnight. Discussions I've seen mention bac, AA or saline WFI, and everything indicates bac works fine. I haven't filtered yet, though supplies are on the way. I'm discarding these, but since this is my first attempt with glutathione I want to know if the process went wrong or the material itself was poor.