I can't get the air bubble out of the syringe every-time before I inject.

Also There is also there is always a little left oil left behind in the syringe as well.

I am thinking instead of flicking the syringe to get to the top and fail removing it every time like a do(and waist a little good gear trying to get it out too)

I should leave the air bubble next to the plunger to help push out all the gear from the syringe?

What do you guys think?