Is it a good idea to use a steamer to kill mold? In a word the answer is no. It is not a good idea to use a steamer to kill mold. Maybe to grow mold, but not to kill mold. But we need to look further into it than that. The two things we are talking about are Black Mold and steam. What is Black Mold? Black Mold is a fungus that can grow anywhere that is moist – and it can grow fast. Once inside, mold can grow almost anywhere moisture accumulates. Wet basements, with or without French Drains and sump pumps, often get mold because of excessive moisture. Unventilated bathrooms are prime candidates for mold. Anywhere in the home that has had a wat...