Hi InfiniDIE,
Check out Newbie tip number 21.
http://www.kiteboardingschool.com.au/tips_&_Tricks.htmThere is only really one way to sort it out, PROPERLY! DO NOT just poke the dump valve inside the LE, you will end up with a blowout for sure.
Read through the text and use what is appropriate. It is usually quicker and easier to remove the bladder and re-insert it with plenty of talcum powder on it as mentioned in a previous reply.
Good luck,