I use this wool wash recipe, which is based on the Martha Gardener Wool Mix available at supermarkets. I've used it for 30 years on all our woollens and delicates and anything clothing or manchester that is stored away. It leaves woollens especially soft and clean, and helps to deter bugs like silverfish and moths that like to feast on our woollies.
4 cups Lux flakes*
4 cups boiling water
1 cup methylated spirits
2 tbsp eucalyptus oil
Mix together and bottle. To use dissolve mixture in hot water, cool before gently kneading woollens to wash. Rinse well and dry carefully in the shade, preferably flat to retain shape.
*Lux flakes - you can use any pure soap flakes or grate cakes of pure soap to get the flakes. Depending on the size of the cakes of soap you'll need 2 or 3. If you use the zester side of your grater the soap will dissolve easily and quickly.
From the Laundry: Manchester Tip Store