You do, but I have consistently found that you actually hardly ever have to do that, if you keep them clean. Certainly way, way less than the manufacturer insis

You do, but I have consistently found that you actually hardly ever have to do that, if you keep them clean. Certainly way, way less than the manufacturer insists that you have to. In any case, whether you agree with me or not about this detail, it's vastly less use of throwaway plastics, less use of metal, less energy use from manufacturing and delivering all that stuff, and of course, way cheaper.