I'm pretty sure you'll be fine cleaning the tank, no worries

Sometimes snakes get grumpy during shed, but if you have a Ball that will strike out just take certain precautions so you won't get bit. If you're worried about him biting you, jut pick him up near the center of his body and gently lift him and set him aside so you can clean the enclosure. Snake bite don't hurt as bad by the way, depending how big the snake actually is LOL.