I just bought some supplies so I can get a leopard gecko. I purchased some T-rex leopard gecko dust ICB for my multivitamin. It says that it is to be used for every feeding but I have heard that most people only give their geckos multivitamin once every few weeks. I just want to know how often I am really supposed to use it. Mealworms are going to be my primary food source and will provide some in a dish at all times. So should I dust all the mealworms each time I replace the eaten ones?