A foul odor from your washer is usually caused by mold, mildew, or detergent buildup. To eliminate odors:

• Run a hot water cycle with vinegar and baking soda once a month.
• Clean the rubber door gasket (for front-load washers) to remove trapped moisture and detergent residue.
• Leave the washer door open after each wash to allow proper air circulation.
• Use high-efficiency (HE) detergent to reduce soap scum buildup.
  If the smell persists, a professional washer repair service may be needed to inspect and clean internal components.