I clean my bong out almost every night, I love to keep things clean. Then when its time to be smoked out of again this is how I adjust my water. First throw in about 4 to 5 ice cubes (depending on the size of your bong). Then fill it up with water. Then finally you can drop a fruit in the water or throw something else in it. I prefer mint leaves off a mint plant. We have one that grows inside and it makes the weed taste like a mix of ganj and winterfresh. My water never smells bad or makes the smoke taste bad. A good cleaning would probably just do the trick for you.