Awwww your first pippie!! Awesome! Congrats!
I leave them on the light grate while they are hatching, IF I'm going to be around to remove the hatchlings from the egg tub. Keep in mind it can sometimes take 3-4 days for them all to come out.
I had to go stay a few nights in Vancouver the other day, so I just moved the remaining 3 eggs to a new tub with moist paper towel so that I didn't have to worry about them trying to get under the light grate or anything.
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Also to note: sometimes before the snake actually emerges they can make multiple slits, nothing to worry about.
Be careful about looking in the incubator too often, I've heard of snakes going back into their eggs because they were startled, and drowning on the fluids insideIt's best to just let them be. I usually check once in the morning and once at night to see if any babies need to be moved to their new tubs in the rack.
The first head looks like a normal to me!