I have a few viles of test-e I'm saving and noticed a cloudly residue at the bottom of the vile. I shake them up and it goes away, but after a while sitting for a while the cloud (white in color) comes back.
From that can one tell if the gear is no good/too old? What's the best way to tell? This is UG stuff.
I've heard that if you heat up the vile it could save it, if so how do you do that?