1. Before washing, wipe off the dust, soak in cold water for 10 to 20 minutes, squeeze out the water, put it in detergent solution or soap solution, gently scrub, and then rinse with clean water. The residual soap can be neutralized by dropping edible vinegar into the water. Dry after washing, and never twist or expose to the sun.
2. Washing with tea can clean the dust, keep the sweater from fading and extend its service life. Use a pot of boiling water, put a proper amount of tea, let the tea soak and filter out the tea, soak the sweater in the tea for about 15 minutes, then gently rub it for several times, then rinse it with clean water. The soaking time of wool clothing in the water should not be too long, that is, it should be completed within 5 to 10 minutes.
3. The washing temperature should not be too high, nor should it be soaked in hot water. Generally, the washing temperature should be controlled at about 40 ℃ to prevent the wool fabric from hardening, shrinking and elasticity decline. Woolen clothing has poor alkali resistance, so high concentration or concentrated strong alkaline detergent cannot be used.