Remnants of dirt, debris, and soap that are not rinsed down the drain can harden on the surface of a bathtub or shower, forming a residue. Limiting the amount of residue is important because mildew often grows in areas where residue is not properly removed. Also, areas that are prone to water infiltration should be regularly inspected and repaired as necessary.
Moisture in a bathroom can lead to peeling finishes, warped doors, and even mold. The purpose of a bathroom exhaust fan is to control moisture and remove airborne odors and pollutants. While maintenance of bathroom exhaust fans is quite often overlooked, a proper maintenance schedule will ensure quiet and efficient operation, increase the fan's lifespan, improve indoor air quality, and keep the unit attractive in appearance.