Air-Lock Injection?

Ive been on TRT for a little over a month and having minor issues with accuracy of splitting my 1ml weekly dose into .50ml 2x a week using 3ml syringe. I stumbled on the Airlock technique for IM injections earlier and wonder if this is typical for you guys and I just missed it? Is there any side affects I should be concerned about injecting a small amount of air 2x a week with my injections?

little bit of air is fine

I use airlock, just don't forget to aspirate first before you push the plunger

Unless you manage to inject 100+ CC's of air, you'll be fine.