In this video, Justin from the Institute of Human Anatomy discusses the various structures ethanol interacts with as it journey’s through the human body after consumption.
To name a few, the most critical part of why it is forbidden to consume alcohol, as explained by Justin, it causes Euphoria, Hangover as a side-effect. See 16:20, 23:20.
Another effect is weight gained, making a bad decision and others that you may find in this video. Literally, for Halal, any intake that harms the body is Haram or forbidden be it short term or long term.
For alcohol cleansing, the use of clean water is adequate to make glasses or bottle Halal again – as long traces of odour, colour, and taste are no longer traceable. It is because ethanol or alcohol is water-soluble properties.