The answer to this question depends on who you ask. Some people believe that it is necessary to empty the kettle after each use, while others think that it is not necessary. There are a few things to consider when making your decision. If you live in an area with hard water, it is probably best to empty the kettle after each use. This will prevent any build-up of minerals in the kettle. If you live in an area with soft water, you may not need to empty the kettle after each use. Another factor to consider is how often you use your kettle. If you only use it occasionally, there is no need to worry about emptying it after each use. However, if you use your kettle on a daily basis, it is probably best to empty it after each use.