My nails have grown longer in almost two months, but are splitting at the ends and are not getting any stronger despite the fact that I am taking two different hair, skin and nail vitamins and two different liquid collagen formulas. I am using rubber gloves more and using my nails as tools, less, but I would have hoped for more growth and strength, and less splitting at the ends. I have bought three bottles of the Rocket Fuel with three different colors of polish as well as the cuticle oil. I wi...