Why do you feel they aren't clean?
Do they have visible stains? If you're on well water, or your incoming water is otherwise very cold, but your washer doesn't have a thermostat, you can fiddle with the warm/cold temperature controls while the washer is filling, to get your wash water temperature up around 70-80°F (20-30°C). Temperatures that high won't harm your clothes, but water below about 65°F won't get them very clean.
Do they have an odor? Baking soda in the laundry works great for me - that, plus a diet low in animal products, and only using the crystal type deodorant.
Is there a buildup of chamois cream in the chamois? Again, slightly warmer water might help, or using a different chamois cream.
Hanging them in the sunshine to dry will help bleach out stains and kill odor-causing bacteria.
ETA: double detergent will just leave more of a residue on the clothes.
Last edited by OakLeaf; 07-24-2009 at 01:21 PM.
Speed comes from what you put behind you. - Judi Ketteler