To anyone doubting the dangers of the cleaning solvents used in electronic component manufacture look up 1-1-1 trichloretahne xylene and tolyuol (sp?) and various isopropyl something or other. look up the hazardous materials data sheets and look at the known health hazards. Then ask yourself if you would like to work in a place where the air is saturated with the fumes from these chemicals. How about having these chemicals leach into your drinking water wells? Remember that with some of these chemicals, even a few parts per million can have long term health effects.