Syringe help

I’m a first semester nursing student and I have an in person skills test for drawing medications tomorrow. No matter what I do I always end up with bubbles underneath the hub I can’t get rid of. I feel so defeated. Any advice with this?

I’m a first semester nursing student and I have an in person skills test for drawing medications tomorrow. No matter what I do I always end up with bubbles underneath the hub I can’t get rid of. I feel so defeated. Any advice with this?