Follow these simple rules and your woollen garment will become more beautiful with every wash.
First and foremost, wool should never be dry cleaned.
A woollen garment should be hand-washed, using a small quantity of neutral soap and lukewarm water. The garment should not be pounded in the water or wrung out, but gently rinsed and dabbed with a towel to remove excess water. It should then be dried horizontally on a terrycloth towel, away from excessive heat sources.
A woollen garment may also be machine-washed, if the machine has a special wool cycle in order to avoid a full spin. In this case, the garment will be gently swung to and fro in order to preserve the fibres. At the end of the washing cycle, the garment must nonetheless be dried horizontally on a terrycloth towel, away from excessive heat sources.