Probably a bit late, Terry, but you just blow through it hard, and the best method is to make a perfect seal with your lips around the 'L' button and blow as hard as you can.
No wind up, just give it a blast and see if it works. :)
Danny
June 2009
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.