The key to keeping stone showers clean and free of mold and mildew in the hot summer months is air flow. Even if your shower is equipped with an exhaust fan, these devices are typically underpowered and are switched off as soon as you finish in the shower.
The best way to limit bacterial and mildew growth is to first, leave the shower door or curtain open after you finish. Leave it open all day or until no visible moisture remains. Second, the use of a squeegee or towel to remove droplets from walls helps your cause considerably. (The last person to shower is responsible for this so it’s good incentive to get up early and start your day). It is also a good time to think about professionally cleaning or re-grouting your shower if you have let mold and mildew build up to a point where you can’t get it clean on your own.
Once you have removed any mold or mildew build up it is important to use the proper cleaning products for your particular stone type. If you have natural stone make sure you use a pH neutral product specifically formulated for natural stone. If you have ceramic you can use something stronger. These little tips go a long way to preserving your investment and reducing overall summer bathroom maintenance.