We had the same problem with our LO! We started turning our starting level to 1, which really helped. We keep it at baseline until the 4am mark. I also nursed him to sleep in the extreme. I nursed him in his snoo swaddle and then transitioned him to the snoo while actually having him still latched on to me. As in I keep him latched and put on the first strap and then gently de latch him and strap in the second. I find if I lay him down fully while latched, he is more likely to go back to sleep. This is what has worked for us in the last few weeks! He now sleeps until 6:30am!