To prevent mirrors from fogging in bathrooms, apply a thin layer of shaving cream to the clean mirror surface, let sit for two minutes, then buff off completely with a microfiber cloth—this creates an invisible barrier that prevents condensation for up to two weeks. For a more permanent solution, install a mirror defogger pad that attaches to the back of the mirror and connects to your bathroom’s electrical system, warming the glass surface to prevent condensation. Commercial anti-fog sprays and wipes containing surfactants create a hydrophilic layer that causes water to sheet rather than form droplets. Improving bathroom ventilation by using exhaust fans during showers and keeping doors open when possible reduces ambient humidity. Temporarily prevent fogging by running a hairdryer over the mirror before showering or wiping with a cloth soaked in warm water to equalize surface temperature.
