I just had this happen to me with 5 vials of test e. There were crystals formed on the bottom and around the neck. Put vials in a pan on stove,covered them with enough water to cover them to the top of the neck not submerging the entire vial and brought them to a decent temp but not to boiling. Took them out, shook the holy hell out of them and repeated 2 times until completely suspended again. Easy enough.