I came up with a way to prevent my very strong 19-week old from busting out of her swaddle...for those who don't appear ready to wean. BTW, she was also busting out of the Miracle Blanket, which wraps around a couple times...and it was ending up covering her face. So I knew I had to do something.
I have the Kiddopotamus Swaddle Me velcro wrap. She was easily getting out of it and waking up. And I am terrible at regular swaddling, so she got out of my swaddles easily. So, inside of the Swaddle Me blanket, I put a half of a receiving blanket, folded in half. So, basically, it acts like the "arm holders" in the Miracle Blanket. I lay her on top of the half of receiving blanket (that's folded in half) and wrap her arms in it and put the excess cloth under her body (her back/bottom). Her body weight actually holds her arms down when she's lying down because the cloth that's holding her arms is under her. Then I wrap her up with the Swaddle Me as usual. I can't belive how well it works. She has NEVER gotten out of this in the 3 weeks we've been doing it. I thought I was going to have to wean, but then thought up this idea and my husband is really impressed! He said I should make swaddle blankets with this idea because it's really hard to get out of. She is sleeping much better than when she was getting her arms out of it.
I have also heard that you can use 2 big muslin swaddling blankets to prevent then from breaking out of it, but I'm not sure how.
I do think I'm going to wean in the next few weeks, though -- I think she's getting ready.
Good luck!
Shannon