Hi Julie, Here is my tip for avoiding bubbles in the syringe. Many here have found that it works:
1. work the plunger back and forth a few times to loosen it up.
2. push the plunger all the way in FORCEFULLY and hold it there.
3. still holding the plunger all the way in, invert the insulin cartridge and insert the needle into the insulin cartridge, ease up on the plunger, and SLOWLY draw out more insulin than you need.
4. with the tip of the needle over a paper towel, slowly TWIST the end of the plunger until you reach your correct dose. (Twisting is easier and more accurate than pushing).
5. give the shot.
The key here is step #2, forcefully holding the plunger all the way in. This expels any air that might be hiding in the syringe and doesn't allow any additional air to get into the syringe.
I use the Monoject syringes, which have a nice, flat plunger and good lines.
Hope this helps,
Ella & Rusty