4. Rust
What it is. Rust from metal fixtures.
How it forms. Rust can drip down from metal fixtures.
Appearance. Orange or brown.
Location. Often near metal fixtures.
Cause. Water and metal.
Clean-up. Remove the rust and repair the fixture.
5. Mold or Mildew
What it is. Mold or mildew growth.
How it forms. Mold and mildew thrive in damp environments.
Appearance. Yellow, green, or black.
Location. Often in bathrooms.
Cause. Moisture.
Clean-up. Use a mold and mildew cleaner.
6. Sap
What it is. Tree sap.
How it forms. If you have a house near trees, sap can drip down.
Appearance. Yellow or brown.
Location. Outside or near windows.
Cause. Trees.
Clean-up. Use a specialized cleaner.
How to Determine the Cause
Look at the location. Where is the dripping?
Look at the color. What color is it?
Look at the texture. Is it sticky, wet, or dry?
Look for other signs. Is there a smell?
Check for leaks. Is there a leak?
Clean it. Wipe it down and see if it returns.
How to Clean Yellow Stains
Identify the cause. The cleaning method depends on the cause.
Use the right cleaner. Use a cleaner that is appropriate for the stain.
Test the cleaner. Test the cleaner in an inconspicuous area.
Ventilate the room. Open a window.
Protect yourself. Wear gloves.
Rinse well. Rinse the area with water.
Dry the area. Dry the area thoroughly.
