Removing armpit odor from shirts without washing them can be challenging, as washing is the most effective way to completely eliminate the smell. However, there are a few methods you can try to temporarily mask or reduce the odor until you can properly wash the shirts:
Spot clean with soap and water: Dampen a cloth or sponge with water and a small amount of mild soap or detergent. Gently scrub the armpit area of the shirt to remove any visible stains or residue that might be contributing to the odor. Rinse the area with clean water and let it air dry.
Use white vinegar: White vinegar can help neutralize odors. Mix equal parts of white vinegar and water in a spray bottle. Lightly spray the armpit area of the shirt and let it air dry. The vinegar smell will fade as it dries, taking some of the armpit odor with it.
Lemon juice: Lemon juice has natural antibacterial properties and a pleasant fragrance. Squeeze some lemon juice onto a cotton ball and rub it gently on the armpit area of the shirt. Allow it to air dry.
Baking soda: Baking soda is known for its ability to absorb odors. Sprinkle a small amount of baking soda directly onto the armpit area of the shirt and let it sit for a few hours or overnight. Shake or brush off the baking soda before wearing the shirt.
Air it out: Hang the shirt outside in the fresh air and sunlight for a few hours. Sunlight can help kill bacteria that cause odors. Be sure to keep it away from direct sunlight for extended periods, as it may fade colors.
Use fabric refresher or odor-neutralizing spray: There are commercial fabric fresheners or odor-neutralizing sprays available in stores. Follow the instructions on the product and spray it on the armpit area of the shirt.
While these methods can help temporarily, they are not a substitute for regular washing. Over time, the odor may return or become more challenging to remove if the shirt isn't properly cleaned. Washing the shirts according to the care instructions with an appropriate detergent remains the best way to keep them fresh and odor-free.