Stanzabol will jam the needle. What size are you using? If you've done a lot of gear in the past you may feel like the needle is plugged, but you could be in some scar tissue. Sustanon shouldn't smell like alcohol; it shouldn't jam a 23ga needle. Explain what "corking" feels like. I'm not familiar with term and am too lazy to look it up. Sounds like dirty gear, can't say if it's bad or not.
It sounds like you have Stanzabol.
Lol that's mad! It's labeled as sus250. So am I gonna get good gain from stana?
Well I've been on this gear for 2.5 weeks now and I've already put on like 4kgs!! And I'm a lot leaner aswel.
Im doing 2mls of the sus250 with 3mls of test prop. And 3-Dbols (blue hearts) a day.
Monday:1ml sus250, 1ml test prop.
Wednesday:1ml test prop.
Friday: 1ml sus250, 1ml test prop.
My vial always smells like alcohol before pin, because I clean it with alcohol. Why not give your gear a good taste? According to the hierarchy of bro science, tasting is equal to mass spectrometry.