The needle depth is designed for comfort. I tried all the depths and the deepest one was best for me. The shallow one seemed to cause more topical reactions. It also depends on your build, if you're very thin, you may need the shallowest one.
If I can walk you through any of it I'll be glad to do so, just email me. When my home health nurse came for Rebif, I had to teach her how to use the auto injector!!!
One tip, get some Tucks pads or witch hazel, it helps a little with reactions. Also, cortisone cream helps a little. I realied on an icepack over the site area before the injection but that is personal preferrence.
Be sure to rub the area really well with the tucks or witch hazel pad after your injection.
Take care. Keep us posted!
Don't be so busy doing good
that you neglect to do what's right!