cut corner with streile scissors, draw out into 20 c seringe, inject through a whatmon into sterile vial, bake at 250 for 15-20 mins with needle in top for air. no probs whatsoever for me.
I don't use the satchets, but just remove all the oil with syringe and inject into a sealed sterile vial as mentioned above. You can get these from getpinz or researchlabsupply.net