Why Machines Get Dirtier After Every Wash Every chemical degreaser leaves behind microscopic residue. On metal surfaces, this residue: Traps dust and oil mist Accelerates oxidation Makes the next round of grime stick even harder In engines, tools, and mechanical housings, this creates a vicious cycle: Clean → residue → heavier buildup → harsher chemicals → surface damage That’s why professional workshops don’t rely on chemicals alone. They use steam.