Don't listen to murphy, some geckos won't mind the water and others will never give up trying to get out. It isn't necessary to soak them at all unless they get have left over shed. I havnt soaked a gecko for about a year now because the shed on the toes isn't that serious, a wet q-tip will get almost any shed off. If your gecko has already eaten its regular meal you dont need to give them extra because you'll end up with an overweight gecko. You can give them as many as they'll eat though because they really are very nutricious. And regarding that cricket comment by murphy, some geckos love crickets and some don't, if you have one that eats crickets it is likly that they will accept worms too. In my opinion crickets from a petstore isn't the best staple food because there is a higher chance of them carrying parasites than mealworms, silkworms, or any other worm you give to your leo.