Rust mould is those mysterious orange/brown rusty spots that appear on cotton clothes, mainly white ones, after they've been washed. It appears (so far as I can access any competent scientific information) that it may be the effect of iron in the hard water oxidising.
- Avoid chlorine bleach and washing powders with chlorine bleach in. This apparently increases the chances of rust mould occurring and sets the stains so they won't come out easily.
- In some places there is often chlorine in the tap water, so the problem can be aggravated by that. < The problem occurs more often when the fabrics are left lying around wet, or left to soak for a long time.
- If you've left something wet or to soak, check it before or after washing. It's best to treat the stain while wet rather than let it dry first.
- Put lemon juice on the stain, either by squeezing half a lemon and dabbing it on the fabric, or by rubbing a slice of lemon on the fabric until the cloth is wet with lemon juice.
- Put the garment out in the sun, or in a bright place where the sun shines in and leave it to dry.
- Repeat steps 1 and 2 until the stain is removed.