I hate to break the news to you, but you've been washing your beloved turtlenecks and cashmere wraps all wrong. Luckily, learning how to wash sweaters correctly isn't hard, it's just easy to overlook.

Use cold water, gentle detergent, and a mesh bag to machine or hand wash wool sweaters safely. Always air dry flat after pressing out moisture with a towel to avoid shrinking or warping. Pre-treat ...