Hand wash , luke warm water in Nikwax Tech wash. Use the bath so you don't have to ball it up to much, but clean bath throughly first to remove any residue. Rinse thouroghly, Nikwax Cotton Proof is a good addition at this point Allow to drip spread flat over an airer with a towel underneath, this prevents any marks from the spreader bars. Air dry with minimum heat. The flatter you can dry it the better.