The Washer is Twisting Then Stretching the Fabric

Even if heat isn’t the problem, though, the way jeans move around inside the washer can be. Consider — your jeans aren’t just plopped in for a little soak. They’re being thrown around, contorted, stretched in different directions. It’s even worse if you overload your washing machine and everything gets all tangled up.

Stretch denim is particularly prone to this. When the fabric is tugged in various directions when it’s damp, some areas remain taut while others pull in. The result? That beautiful warped, wavy effect that ages your jeans by 10 years overnight.