As long as you are properly cleaning the tops prior to drawing out your doses you should be fine. The "Discard after" warning is a CYA by the manufacturer as some people are less than ideal when it come to sterile procedure and after 28 days these people MAY contaminate the bottle beyond what the BA can handle and thus potentially cause an infection. It also makes folks toss it and buy more, in theory, as it's easier said than done with a C3 medication.
NOT SUGGESTING:
But I found an old script in the closet with 2ml left in the bottle. Since our leaders make it easier to obtain fent than they do testosterone I decided to use it. I drew a little out, squirted it on my hand and spread it around. I then smelled it to see if it had gone rancid. It smelled the EXACT same as it ever did. I took my shots and all was good. The bottle had EXPIRED COMPLETELY 3 years ago. Just saying, use common sense.
