If you own a Barbour jacket, you may notice a musty smell. The smell is partly the odor of the wax sealed in the jacket to keep it waterproof. It is also because you can't wash it without damaging the proofing. Cleaning with a canvas cleaner (like Otter Wax's), spraying with a 1:1 mixture of vodka and water, and letting it hang in a garbage bag with a couple of cotton wool balls soaked in vanilla essence, are great ways to fix the small.