2. Cotton and linen fabrics can be soaked in 3% salt water or washed with Jiang Shui or wax gourd water. You can also scrub with 5% acetic acid solution and 5% ammonia water, and then wash with cold water.

3. Silk and tweed clothes can be soaked in 1% hydrochloric acid solution and then washed with clear water.

4. You can also wash it with washing powder first, then soak it in salt water for several hours, then specially wash the black spots on it, and then clean it with clear water.

5, can be washed off after soaking in 84 disinfectant.