If it is used to remove pesticide residues from fruits and vegetables, you can take a spoonful of baking soda and put it in water. After the water turns yellow, you can put it in for about three minutes. If you want to use baking soda to decontaminate, the dosage is about 2/3 cups, and the effect is very good. If it is used to remove dirt from thermos bottles, the dosage is 50g, which can be dissolved in hot water and poured into the bottles. If you want to remove tea stains, you can directly wipe them with your fingers dipped in baking soda, and it won't take long to remove tea stains.