I believe that there are many students who don’t know the functions of the wet rag in Lighting 2 Knock on the Door. Next, the editor of Source Code Network shared the "List of Functions of the Wet Rag in Lighting 2 Knock on the Door" for children who have these questions. Let's take a look, maybe it can help you.
Use a wet rag to cover your mouth and nose when entering the warehouse. If you go to the warehouse without a wet rag, it will tell you there is a smell.