A. Showers are best kept clean by wiping them down with a towel after showering. Using a squeegee is not sufficient because it leaves the soap scum in the grout joints, leading to mildew. Remember water and dirt cause the mildew not the grout. Wiping it down after every shower will keep it clean. Normally this wouldn't take much more than 30 seconds to do. I haven't washed mine in over a year ( maybe longer??) and it still looks great. When you do clean the shower, use vinegar, or use a mild detergent. You shouldn't use bleach, it will discolor the grout and even remove the protective glaze on the tile. If you must use it do so sparingly. If it really looks bad you can use sulfamic acid. Please read post "Should I seal my grout".
