Spontaneous Combustion: Many believe it’s a myth….it’s not and this is the most common way these fires ignite. Spontaneous Combustion of oily rags occurs when rag or cloth is slowly heated to its ignition point through oxidation. A substance will begin to release heat as it oxidizes. If this heat has no way to escape, like in a pile, the temperature will rise to a level high enough to ignite the oil and ignite the rag or cloth. How to Safely Handle Oily Rags: ▪️Never leave cleaning rags in a pil