 If you want to go the extra step and really keep your blender container looking nice and you have a minute, you should dry the interior of it because that is really what's going to keep your container looking like new. I can show you what lazy parents do instead of that and the difference. Now we use this every single day, many times a day, but that's the difference between drying your container and not drying your container. This is not a dirty container, it just has mineral buildup on it from the water that we use that has minerals in it because it's water from the land.