Citric acid can be used to wash clothes, it has the effect of removing stains, removing odor and preventing clothes from hardening. When using citric acid to wash clothes, you can refer to the following steps:

1. Use the right amount: don't use too much citric acid, usually a spoonful of citric acid is enough.

2. Separate from laundry detergent: citric acid should not be mixed with laundry detergent, it is better to add citric acid and detergent into the washing machine separately.

It should be noted that in some cases, citric acid may cause slight discoloration or damage to some clothes. Therefore, it is best to test citric acid on an inconspicuous part of the clothing before using it in the wash to ensure that it does not adversely affect the clothing.