can you stretch a wetsuit hat ?

I have one of these:-
http://www.littlepinkshop.com/shop/cskins-adjustable-surf-hood-p-416.html
where the peak attaches to the hood it applies some pressure to your head which hurts after time, all i think i need to do is to stretch the hood some how.
Has anyone managed to stretch their hood ? If so how ?
http://www.littlepinkshop.com/shop/cskins-adjustable-surf-hood-p-416.html
where the peak attaches to the hood it applies some pressure to your head which hurts after time, all i think i need to do is to stretch the hood some how.
Has anyone managed to stretch their hood ? If so how ?