I dont bake.
Keep the filter attached to the needle, and keep the needle in the sterile vial the whole time. Unscrew the syringe from the filter...what I do is use a 20cc syringe. I unscrew it just a little, to allow air flow and I pull the plunger out of the body of the syringe. I then pour the oil into the syringe, screw the syringe back onto the filter nice and snug, and put the plunger back in. Makes it easy.