We use the Blue Streak but instead of using the Blue Streak chemicals, I mix 1/3 parts of SuperClean, Pinesol & water. The Blue Streak dispenses the mix every time you flush. I empty the tanks and if we are towing to another cg, use the same mix in about 2 gals of water and empty as soon as we set up. Do the same the last day out before parking at home and empty as soon as we get home and add the mix to the empty tank and leave it until we get to a cg. Never have an odor from the tanks. Just this year, started adding a pack of dishwasher soap to see what if it does anything. So far, can't tell any difference, so when the packs are gone, I will not buy more.