Other then keeping humidity up. You can use a product by Zilla called Shed-Ease. You can dilute the solution with water. And soak your snakes for at least 20-30 minutes in the diluted solution as needed. The solution has an aloe Vera in it to sooth and moisturize the skin for easy emergence of old skin. I use this product all the time and it really helps. My snakes never have problems with shedding. They often shed in one whole piece. I usually soak my snakes once a month in the solution and whenever I see symptoms of the shedding process. You can view photos of my snakes on my page and see that they all have beautiful and healthy skin. None of my snakes have pieces of old skin on their bodies.