Black mold around shower silicone is common because warm, damp corners stay wet long after the water stops. The quickest safe approach begins with ventilation. Open a window, switch on the extractor fan, and wear cleaning gloves.

Soak strips of kitchen paper or cotton pads with 3% hydrogen peroxide, then press them against the stained silicone. Leave them in place for 30 to 60 minutes so the liquid stays in contact with the mold instead of running away. Remove the strips, scrub gently with an old toothbrush, rinse with water, and dry the area completely.

For stubborn marks, repeat the treatment rather than mixing several cleaners. Never combine bleach, ammonia, vinegar, or hydrogen peroxide, because dangerous fumes or irritating chemicals can form. Keep children and pets away while cleaning.

If the dark staining remains after repeated cleaning, the mold may have grown beneath or inside the silicone. In that case, removing the old sealant and applying fresh bathroom-grade, mold-resistant silicone is usually the only lasting solution.

Once clean, reduce growth by wiping the shower edges after use, leaving the door open, and running the fan for at least 20 minutes. Keeping the silicone dry is the most effective long-term prevention.