Seeing yellow streaks or droplets on your bathroom walls can be alarming—but it’s usually not a sign of something dangerous. More often, it’s a combination of soap scum, hard water minerals, mold, or even nicotine residue reacting with moisture and time. Let’s break down the most likely causes—so you can clean it safely and prevent it from coming back.
🚿 Top 4 Causes of Yellow Drips or Stains
1. Soap Scum + Hard Water Buildup
- What it is: A mix of soap residue, body oils, and minerals (like calcium and magnesium) from hard water. Over time, this film oxidizes and turns yellow or brown, especially near showers or sinks.
- Where it appears: On tiles, grout, glass doors, or painted walls near water sources.
- Texture: Sticky, waxy, or crusty.
- ✅ Fix: Scrub with a paste of baking soda + vinegar or use a commercial lime/soap scum remover. Rinse well.
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