If you’re talking about the dark ring or black stains around a faucet where it meets the sink, it’s usually caused by a buildup of mineral deposits, soap scum, mold, or mildew. Here’s how to remove it:
- Clean with vinegar
- Soak a cloth or paper towel in white vinegar.
- Wrap it around the base of the faucet for 30–60 minutes.
- Scrub with an old toothbrush or a soft brush.
- Use baking soda for stubborn stains
- Make a paste with baking soda and a little water.
- Apply it to the dark ring and gently scrub.
- Rinse thoroughly.
- If mold is present
- Apply a diluted bleach solution (1 part bleach to 10 parts water) or a mold remover.
- Let it sit for a few minutes, then scrub and rinse well.
- Never mix bleach with vinegar or other cleaners.
- If the stain won’t come off
- The discoloration may be trapped under old caulk or around the faucet base.
- You may need to remove the old caulk, clean the area thoroughly, and apply fresh waterproof silicone caulk.
If you can upload a photo of the dark circle, I can help identify whether it’s mineral buildup, mold, rust, or something else and suggest the best treatment.
