We have a tommee tippee sleeping bag swaddle where arms are in but the poppers can be opened for arms out. We keep our 7 week old arms in however in the past week or so I've noticed she gets her hands up at the neck and keeps her hands near to her face. I've tried arms out but she does not sleep well as still has the reflex and wakes herself up - any advice for transitioning? She broke the zip of the swaddle last night that's how determined she is 😂