Over the course of the day, as you sweat and move about, deodorant can transfer from your underarms to your clothing. As the deodorant builds up, it can leave a white, crusty deodorant stain on your clothing. If your garment is made of a delicate fabric such as wool or silk, the deodorant stain can also cause discolouration to the fabric itself.
Fill a bucket with warm water, 1/2 cup of white vinegar and 2 tbsps. of table salt. Place your deodorant-stained washable garments in the bucket with the vinegar and salt solution and allow them to soak overnight, as the vinegar and salt solution will loosen the crusted-on stains.
Dip an old toothbrush into the vinegar and salt solution. Scrub the deodorant stains on your clothing with the old toothbrush. Flush the site of the deodorant stains with cool water.
Pour prewash laundry stain remover onto any remaining deodorant stains on your washable garments. Rub the fabric together to work the prewash into the fibres of the fabric. Allow the prewash to sit on the deodorant stains for 10 minutes.
Launder your washable garments as usual. Prior to placing your garments in the dryer, make sure the deodorant stain is completely removed so the dryer heat doesn't set the stain.
Dampen the site of the deodorant stain on your fine washable garment. Pour a quarter-sized amount of prewash stain-removing liquid onto a clean sponge and blot at the deodorant stain. Continue to blot, rather then rub and scrub, from the outside of the stain moving inward.
Rinse out your sponge with warm water, then dab the sponge onto the deodorant stain on your fine washables. Alternately rinse the sponge and blot at the stain until you've removed all the prewash stain-removing liquid and deodorant stain.
Restore colour in your fine washable that's faded due to the deodorant stain. Mix equal amounts of ammonia and water in a bowl. Blot the diluted ammonia solution onto the deodorant stain on your fine washable to return the fabric to its normal colour.
Wash your fine washables according to manufacturers' directions.
Use a liquid deodorant to avoid chalky, white deodorant stains caused by deodorant sticks.
Chlorine bleach can be used to remove deodorant stains on white clothing, but make sure there aren't perspiration stains too. Bleach will turn perspiration stains yellow.