Well when a snake is in shed i would say not to handle it. I wouldnt even worryabout feeding him either. We have some snakes that will eat even in shed but best not to chance it unless you have another snake that can take the rodent if he doesnt eat. Eyes are blued over means there deep into shed. Now once he starts to get ready to shed his eyes will clear up and his body will too. He wont look so ghostly anymore than within 24-48 hours he should shed. 78% is high in my opinion. We keep our snake room at about 55%-60% humidity and 90% of our snakes have full sock sheds. There will always be snakes that dont shed in one piece even if the humidity is at 100% just how some snakes are. Now on how long it takes for them to shed can differ. We have some that only takes a week and some snakes we have take 2 weeks. If he doesnt fully shed when he is ready then after he has tried soak him in warm water for an hour and that will loosen the stuck shed and be eaiser for you to get it off him. Never pull a shed off unless its ready to come off because it could kill your snake. What i would mostly be worried about is eye caps left on because that will damage his eyes. Hope this helps.