Yeah know the feeling, but if it dont smell or taste good i leave it alone... If it tastes bad, it reminds me of the days where i smoked really lowgrade hash mixt with tobacco on a shitty little plastic bong - and every day coughing out my lungs - JUST CAN'T STAND IT ANY MORE! ;-) so thank you god(and bubbleman) for cold water extraction and vaporizer's
Peace