A wool scarf can be scratchy for several reasons. The quality of the wool, the type of wool and the way the wool has been prepared all contribute to the itch factor. Some scarves can be softened enough to be comfortable while others may need to be worn over a soft sweater or jacket. The techniques used to soften a scarf won't damage it in any way, and may make it itch-free enough to wear close to the skin.
Fill a sink with warm water. Add a quarter cup of wool soak or baby shampoo. Swish the water with your hand to blend the mixture.
Add the scarf to the water. Push the scarf underneath the water and wait until it is totally submerged. Wool is water resistant, so this may take a few moments. When the wool scarf is saturated, it will sink to the bottom of the sink.
Soak the scarf for at least an hour. Drain the sink. Remove the scarf.
Fill the sink with warm water and add a cap full of any type of hair conditioner, swirling to blend. Add the wet scarf and soak for 30 minutes.
Drain the sink and press gently on the scarf to remove as much water as you can. There is no need to rinse the scarf.
Lay the towel on a flat surface in a low traffic part of your home. Spread the scarf on top of the towel and pat it into shape. Allow it to air dry. Depending on the thickness, this could take a full day or longer.