Deodorant keeps embarrassing sweat odors at bay, but his handy product can leave a residue behind -- even on expensive cashmere. If you notice white deodorant stains inside or outside your sweater, you can usually hand-wash these discolorations away. People who tend to use a lot of deodorant or apply several applications a day may need to switch to a clear, gel product. Allowing your deodorant to completely dry before putting on the garment may help avoid this problem.
Fill a plastic basin or a clean sink with warm water, around 85 degrees Fahrenheit. Pour in a cap full or teaspoonful of baby shampoo. Use your hand to blend the detergent with the water.
Turn the sweater inside out. Use a lint brush to brush away any dried deodorant crumbs left on the fabric. If they will not come off with the brush, leave them. You do not want to tug or tear the fabric by pulling or scraping the deodorant away.
Submerge the garment in the water. Squish the garment around in the water, then use your fingers to gently rub the armpit areas, but do not rub the fabric together. This may cause piling. Allow the cashmere to soak for 15 to 20 minutes.
Drain or pour out the soap water. Refill the basin with fresh, clean water. Swirl the garment around in the water to remove the soap.
Place a thick towel on a table or counter near the soaking sweater. Lift the garment from the water, squeezing it slightly to remove the excess water.
Place the sweater on the towel. Roll the towel up to dry the sweater. Lay the sweater on a mesh rack to dry.