Eliminate stains by dampening the affected area with water and spraying it with commercial laundry stain remover as quickly as possible.
Separate white T-shirts from colored clothing before washing.
Add only the recommended amount of detergent when washing white T-shirts, as residue left behind by using too much product can cause dinginess.
Fill the tub with the hottest water temperature recommended on the garment's care label.
Add 1/2 cup of borax with the recommended amount of laundry detergent to brighten white T-shirts.
Pour 1/2 cup of white vinegar into the rinse water if you have hard water, which grays white T-shirts over time.
Hang T-shirts made of natural fibers outdoors in bright sunlight if possible, which brightens whites naturally.