1.Plastic bucket sprayer: First pour 5% hot alkali water (water temperature above 60°C), fill it with various parts such as sprayer and sprayer, shake once every 10 minutes, and after 2 to 3 hours, add lye Pour out and rinse with water 2 to 4 times. 2. Iron barrel sprayer: First pour 1% black saponin (ie, ferrous sulfate solution) soak for 2 hours, then rinse with water 2 to 4 times; you can also soak in hot alkali water (same method as above) for 1 hour. Rinse again with hot alkaline water, and finally rinse with water 4 to 5 times. Earthworm Feed,5Kg Earthworm Feed,10Kg Earthworm Feed,15Kg Earthworm Feed Fenxi Kangruilai Biotechnology Co., Ltd. , https://www.kangruilai-petfeed.com