omg there are some fully unwell people on this forum

Justin - you only need to take your bladders out if they are full of water or sand. For sand, take out the bladder and let it dry out with the valve open until the sand dries out. Blow up the bladder and let the ball block the hole. Shake the bladder untill the sand is over the ball, carefully push the ball in with a blunt object and the pressure should blow out the sand.
Same procedure for water.
Clean the outside with talcum powder.
If you have any other substances in your bladder that you were trying to smuggle out of another country, bring the kite round to my place and I'll give you a hand...