I would agree snakes go blue and then clear up and shed a couple days later. As for any type of shed aid I would advise against using it until there is an issue. When the snake goes blue this is actually fluid they produce between the new skin and old. When you apply shed aid, soak the snake, or get them wet you can wash this fluid away and lead to a poor shed. So I would not use anything to aid shedding unless there is a problem and you have a stuck shed concern.