Tucker wedge

I agree with Christine, swaddle him so he doesn’t move his arms. Taylor is almost 9 months but sometimes we still have to swaddle her since she is always waving her arms, playing with her ears, rubbing her eyes and ends up waking up herself.

I’d also try swaddling. If that doesn’t work over a few nights, then maybe I would try to elevate the mattress but not as much, and just use the sling that way until he got used to sleeping on an incline. How was he sleeping before? Maybe he’s just not used to dangling on such an incline.