1. For coffee stains on clothes, you can first wash with detergent liquid, then add a few drops of ammonia water and then wash. If it is a wool clothing, you should not use ammonia water, because ammonia water is very alkaline and will destroy the scaly structure on the surface of the wool fibers. It should be washed with glycerin liquid instead.
2. To remove coffee stains, you can immediately wash them with 70-80% hot water to remove them.
3. Old coffee traces can be wiped with a mixture of glycerin and egg yolks, and then rinsed with clean water after drying. Or apply glycerin on the stain, sprinkle a few borax and soak it in boiling water. You can also wipe it with diluted ammonia water, borax and warm water. Old coffee traces can be wiped with 3% hydrogen peroxide solution, then washed with clean water, or washed with salt or glycerin solution.
4. Not too strong coffee traces: Not too strong coffee stains can be washed clean with soap or washing powder in hot water.
5. Stronger coffee: Stronger coffee requires sprinkling a little glycerin into the egg yolk, mix and apply it to the stain. After drying, wash the coffee stain with soap and hot water to remove it.