Yes, it should be washed after use. This is because the chest patch is in direct contact with the skin, and there are bacteria and dirt on the skin. If the chest patch is not cleaned, bacteria will breed, leading to infection, allergy and other problems. In addition, the glue on the chest sticker will absorb grease and sweat on the skin during use. If not cleaned in time, the glue on the chest sticker will become less viscous, affecting the use effect. Therefore, after each use of the breast patch, it should be washed with warm water and soap, and then dried.