Washing your mat
Vacuum the mat for dirt, mud, grass etc.
Place mat into a wash bag to catch loose fibres.
Wash at 30 degrees using a small amount of wool detergent.
Do not tumble dry. Do not use fabric softner.
While the fibres are still damp, brush the wool fibres to restore loft and fluffiness.
Hang dry away from direct heat.
Brushing your mat
You want to brush the wool fibres so that it not mat.
You can use a wool brush/slicker brush so that your can clean and restore the wool fibres.
Start by folding section and brush upwards/away so that the fibres lengthen. Continue until the whole mat is done.
Once done it should look soft again and not not matted.