Note: To achieve the best results in maintaining the bright white look in the armpit area, although it may not be necessary to do it before every wash, at least you should “take care” of it more often, even before washing. when my eyes see the dirt.
In case you don’t have baking soda at home, you can use more familiar ingredients such as:

– Toothpaste: Squeeze the toothpaste, spread evenly over the stain, use a toothbrush to scrub a little before washing.
>> See more: What are the uses of toothpaste that not everyone knows?
– Aspirin contains salicylic acid: Crush about 2 – 3 pills, then mix with about 1 cup of warm water and soak the shirt for a few hours. Wash thoroughly to avoid the lingering antibiotic smell, which will create an unpleasant feeling.

– Lemon: If you use lemon to rub on the armpit of your shirt before washing, the shirt will not only be white but also have a cool scent. However, if the stain has hardened, you may need to mix lemon juice with water, salt, and baking soda in a ratio of 1:1:0.5:0.5 and then rub on the stain before washing. .

These simple, inexpensive tips are extremely convenient and useful. Quickly try this on shirts with yellow stains on the armpits!