first rinse your BC inside and out after every dive including fresh water , as lake quarry water ect could have some kind of contaminates ,
method of rinsing is this first drain as much water out as possible
then fill up with water and drain several times perfer with warm water not too hot ,
the4n after your sure you got it rinsed real good take a litle bit like a cap full of mouth wash and poor into the bc this does several things one it freshen the inside , also it might help prevent crystal particles from forming never store your BC 100% dry as this can over extended time cause the bladder to get dryed out and become brittle , these just some suggectiosn and sure going to bring some coments but I have talked with many BC manufactures and every one of them recomend this including the mouth wash !!!!!!!!!!!