Smoking is bad for you and cleaning house is good, right? Wrong. If you use conventional cleaning products, you may as well smoke. A new study shows the lung decline over 20 years caused by using conventional cleaning products, which have no federal regulations for health or safety, equals that of smoking 20 cigarettes a day. The toxic chemicals used in cleaning products damage the lungs little by little, adding up to a significant impact that rivals a pack-a-day smoking habit.