Once the veins are gone you can pick the shell from above his head
Then double check the veins are gone and pull that membrane back
Once baby gets his head free he most likely be able to push the rest of the way out
Any of mine that were stuck I would gently help gwt the head and neck out and...
Using Vaseline lasts much longer then the oils
I use the oil to check for veins then Vaseline to keep the membrane moist
Last about 3 hours rather then oil about 1-2
Could also add a small cloth wetting it with warm water to you humidity