pull back on the stopper, and then re-apply pressure, but not alot, the filters work best with onlt an easy amount of pressure, or the needle and syringe filter will come apart and the tren will blow all over the place, and you will be like a dog licking that shit up LMFAO!
I'm using an 18 gauge needle tip, so thats not it. I tried pulling out and then re-injecting, but that didn't work either. Is it possible my filter is not working or blocked some how?
also, if the sterile filter is not on the barrel just right it wont go either, try removing filter and putting back on barrel. Also remember to put another pin through the stopper to release preasure as you sterile filter into the vial.