SouthernCB: Perspiration, if allowed to stay in fabric, will eventually permanently stain and weaken the fabric. Aluminum chlorides in antiperspirants can also stain and weaken fabric. Controlled use of antiperspirants and laundering shirts immediately after wear can minimize the damage. 1.If the stains are fresh, soak the shirt in ammonia for 30 minutes then wash. 2.If they are older stains, try soaking in vinegar first. If that doesn't do it, try heated white vinegar and borax or non-chlorine bleach. Old stains are more difficult to treat because they have been set, particularly from being heated in the dryer. You can also put liquid laundry detergent right on the stain, leave it for five to ten minutes, then wash. Launder shirts in the hottest water safe for the fabric, using an enzyme detergent or a detergent with bleach alternative (check care labels to be sure this is okay). White Wine Vinegar - sold next to the salad dressing in the grocery store is great for setting colors thus preventing fading, and a fabulous cleaner, even cleans spots on suede. Vinegar, a dilute solution of acetic acid obtained by fermentation beyond the alcohol stage, has been around for over 3000 years when the Chinese distilled rice wine vinegar. The name comes from the Latin "Vinum" or "Vin" for wine and "Aigre" meaning sour. Want to reduce fading? Try soaking a brand new garment in cold water and vinegar. This should set the color. Salt is an alternative to vinegar. Set the washing machine settings to cold water and small load. Pour a cup of vinegar into the cold water and let the machine mix it for about 1 minute. Turn the garment inside out (a good tip for regular washing) and place it in the washing machine. Let it mix for a few more minutes, until the garment is submerged. Then shut the machine off and let it soak overnight or at least for a few hours. Then turn the machine back on and let it complete the cycle. A little vinegar each time you wash helps keep the color in it's original state and helps cleaning. Andy