To the Forum.

As a general rule, roughly 4-7 days before the shed some or all of these symptoms occur : your snakes eyes will get cloudy, milky, or what is referred to as in the blue, Their belly may get a little pink as well. Their activity slows down or even stops for a few days. Basically they want to be left alone. This is why their disposition may turn a little sour and it's best not to handle them or feed them until the day after shed.

Unless your humidity is usually dead on at 50-60%, crank it up to 70 when these signs show to ensure an even one piece shed.
Some folks crank it up anyway.