Git a razor blade and work it about parallel under the edge of the clutch; it will pop off. Then put it between two lil' squares of filter floss. Then wrap it in a paper towel, wetted w/tank water and wrung out, just one thickness. Then put the package in a gallon-size ziplock bag, fill with air and seal. Put it on top of a tank to keep warm, but not on the vent or really hot part.
Daily empty the air and refill. Start checking in a few days to see if it's changing color. Give it 2 weeks before you give up on it, but it could hatch as fast as 6 days or so. If it's fertile, one day you'll see a baby or babies in there; crumble the rest of the clutch into the tank where you want 'em to help the babies out. If it's not fertile the eggs will remain just goo inside. After 2 weeks w/no hatching, break one open with a fingernail.
I hope they hatch well for you, but if not I have a feeling you will be getting lots of clutches from here on in. Congratulations!!
PS-Unless you want 20 billion snails, you might want to stop at incubating just one or two; each clutch can make hundreds.
