Sometimes we may find black spots on milky white clothes, and these gray-black spots are not evenly distributed on the clothes and cannot be washed off, so the clothes cannot be worn. The key reason for the appearance of gray-black spots on clothes is:

1. Weather-related reasons. According to your situation, it is very likely due to high humidity, because the clothes are not easy to dry when it is hot and humid, so the clothes are more likely to grow mildew spots, especially on milky white clothes.

2. Reasons related to insects. If the ceiling of the location where clothes are dried has not been cleaned for a long time and there are too many insects gathered on it, then these insects will defecate on the clothes, causing gray-black spots on the clothes. However, these spots are relatively easy to clean.

3. The small white spots on the clothes are due to sweat not being completely removed from the body, which is oxidized, thus producing ‘black spots’.

Ways to remove small black spots: Mash a piece of winter melon, put it in a cloth bag, squeeze out the juice, and use it to wash clothes with sweat stains by hand, then rinse clean with fresh water. Or soak the sweat-stained clothes in 5% edible salt water for 1 hour, then gently rub and wash with cold water.

If you smell an unpleasant odor coming from the clothes in the closet, it may be that the clothes have grown more black spots. You can add one teaspoon of white vinegar and half a bag of milk to cold water in the washing basin, soak the clothes in this specially prepared washing water for 10 minutes, allowing the vinegar and milk to absorb the unpleasant odor from the clothes, then rinse and squeeze, rub left and right, and finally wash clean with cold water to remove the odor.

The black spots are due to the sweat on the clothes not being cleaned properly. Sweaty clothes should be washed as soon as they are changed. Urea solution and carbonates in sweat are soluble in strong electrolytes and very soluble in boiling water; however, the proteins in sweat can normally dissolve in water in the form of colloidal solutions, but they will coagulate when heated and are not easily soluble in strong electrolytes. Therefore, sweaty clothes should not be washed with boiling water. This way, the clothes are less likely to produce black spots.

Tips for preventing clothes from mildewing:

1. Sunlight. Remember to take the clothes out and expose them to the sun when the sunlight is very good, at this time it will be better. Sunlight has a very good sterilization effect on clothes, so those who are hardworking can avoid the clothes from mildewing or dampening.

2. When placing clothes in the kitchen cabinet, we can moderately place some unnecessary newspapers or the edges of paper boxes under the kitchen cabinet to reasonably absorb moisture that can cause clothes and pants to mildew, but it is necessary to frequently open the wooden cabinet to check for signs of dampness.

3. Plastic packaging bags can now be purchased with many types of plastic organizing bags. We can buy some plastic organizing bags to put clothes in, and then extract the air to create a vacuum pump-like environment, which is less likely to cause mold.