[header] How to make fog [title] Heat water until it's very hot, but not boiling. [step] If your tap water is very hot, you might be able to use this water right out of the tap. You can also heat water on the stove, or fill a glass container and heat it in the microwave. 
[substeps] The water should be hot to the touch but not quite boiling. Aim for a temperature somewhere between 120 and 180 degrees fahrenheit (49 and 82 degrees celsius).