Swaddling

Babies love being swaddled and Emmet also loves it. We wrap him up snugly in an Annais swaddle blanket at night. I love these blankets because they are really big for a tight swaddle and material is thin enough that he won't suffocate. An awesome purchase.
His favorite swaddle so far is done by mommy with the Happiest Baby on the Block swaddle. Even better than the swaddles all the nurses and doctors did at the hospital. Once he gets a full tummy and a tight swaddle, he'll fall asleep for 3plus hours. Mommy wakes him up at 3hours to feed him so her milk supply will keep up.
He spits up a lot still even after a good burp (notice the yellow stains on the sheet). Anyone know any awesome burping techniques? I try the over the shoulder but it takes a while and he might have a few more air bubbles left in his tummy.