Rub the mark with a clean nylon stocking or dry microfiber cloth
Use a damp cloth to gently wipe the residue
Apply white vinegar to the stain, then blot with a clean cloth
Make a paste of baking soda and water, rub lightly, then rinse
Use a lint roller to lift loose deodorant buildup
Try a damp dryer sheet to remove white streaks
Wash the shirt inside out with cold water
Use liquid detergent directly on the mark before washing
Avoid hot water until the stain is gone
Air dry the shirt and check before using a dryer
Repeat the treatment if needed before drying
Prevent future marks by letting deodorant dry before dressing