MWFs reduce the heat and friction between the cutting tool and the work piece, and help prevent burning and smoking. Applying MWFs also helps improve the quality of the work piece by continuously removing the fines, chips, and swarfs from the tool being used and the surface of the workpiece. Exposure to metalworking fluids can cause; irritation of the skin/dermatitis, occupational asthma, bronchitis, irritation of the upper respiratory tract, breathing difficulties or rarely, a more serious lung disease called extrinsic allergic alveolitis (EAA).