Wash socks using cold or warm water with a mild laundry soap (ecological, biodegradable types preferred) and drying on the line is the best way to clean and maintain all Just Sockz socks.
To remove stains, dirt or grease from your garment, dampen the stain and rub in dish washing detergent or a safe pre-treatment cleaning fluid (NO BLEACH, if in doubt test a small corner inside) both of which you can find at your local supermarket. Then hand wash the garment in warm water with plenty of mild laundry soap