Unfortunately the weather is wreaking havoc on some of my snakes sheds too - it's not a big deal usually a little extra humidity and they will slough off by themselves - especailly if it's just a small area - if hes not too headshy get a warm wet washcloth and rub his head a bit.
Here's one of mine that just shed out - notice he's still got some scales left on his head - they'll most likely be gone in a day or so.

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Tosha 
"One of these days i am going to wake up..look around...and realize my place looks more like "Ace Venturas"s than my own." Coldthumb
7.33.0 Ball Python (Harry and Fluffy and gang)
1.0.0 Angolan Python (Skywalker)
0.0.1 Green Tree Python
0.2.0 Feline (Pippen and Pandora)
0.0.1 Dessert Tortoise (Pope John Paul "JP"
2.2.1 Fish (1,2,3,4)
0.0.2 frogs rescued from pool skimmer
0.0.1 lizard rescued from vicious feline