If it has moisture in it I would trash it but if it’s just simply crashed then I would heat it back into solution and let it sit for a week to see if it crashes again. I stoped injecting air into vials years ago theirs really no need. It will draw up just fine without injecting air into it first and doing so increase the risk for problems such as contamination, moisture, leaking stoppers. The gear will stay good much longer too if you open a vial and have to store it for a good bit of time for whatever reason