🧺 Rust-colored stains after washing.

Rust-colored stains on cloth diapers after washing can be alarming, but they usually have a few common causes. Here’s a breakdown of what might be going on and how to fix it:

Common Causes of Rust-Colored Stains

Iron in the Water Supply (Hard Water)

High levels of iron or minerals in your water can oxidize during washing, especially if bleach or other oxidizers are used, leading to orange or rust stains.

Rusty Washing Machine Parts

Old or corroded parts (like drum components, hoses, or water inlet valves) can leach rust into your wash water, leaving spots or discoloration.

Bleach Reaction

When bleach reacts with iron in the water or drum, it can produce rust-colored stains even on clean diapers.

Iron-Rich Well Water

Homes with well water are particularly prone to this, especially if the water isn’t treated with a softener or iron filter.

How to Deal With It

Immediate Fix (for diapers already stained):

RIT Rust Remover (or RIT Iron Out):

Safe for fabrics (check label), this can lift rust stains. Always do a spot test first.

Lemon Juice + Sun:

Apply lemon juice to the stain and dry in the sun. It may naturally bleach out rust-colored spots.

Repeat Washing with Softened Water:

Rewash stained diapers in softened or filtered water to prevent further staining.

Prevent Future Stains:

Install a Water Softener or Iron Filter:

Especially if you're on a well or know your municipal water is high in iron.

Avoid Bleach if You Have Iron-Rich Water:

It reacts with iron and worsens staining. Use oxygen bleach (like OxiClean) instead.

Check Washer Parts for Corrosion:

Especially older machines—hoses, drum, or fittings might be rusting.

Use a Laundry Additive for Hard Water:

Products like Calgon or Borax can bind minerals before they stain.

 

How to Test Your Water for Iron and Hardness

1. At-Home Water Test Kits (Best Option)

Look for kits that test for hardness, iron, pH, and chlorine.

Available at hardware stores, online (Amazon, Home Depot, etc.).

Follow the instructions—typically involves dipping a strip into a water sample and comparing colors.

2. Free Testing Services

If you're on municipal water, your provider may offer a free water quality report.

If you’re on well water, many companies (like Culligan or local water treatment services) offer free or low-cost testing.

3. Quick DIY Clues (Not Precise)

Hard water signs: Stiff laundry, white residue on faucets, soap that doesn’t lather well.

Iron signs: Orange or rusty stains in toilet bowls, sinks, or on white laundry.