If you've ever wondered where those pesky yellow stains come from on your bedding, you can thank sweat for them. Urea, a by-product chemical found in sweat, breaks down over time and turns into ammonia, causing the dreaded stains.
Thankfully, there's ways to combat these unsightly stains - and one cleaning lover thinks they've found the easiest method.
A fan of cleaning guru Mrs Hinch has shared how she removes the yellow marks from her pillows, taking to the popular Facebook page Mrs Hinch Made Me Do It to reveal her findings.