A tiny little part made out of the right kind of plastic material can help in saving hundreds, thousands or even more lives. Smart fire detectors ensure safety all around the world in public places like shopping malls, hotels and subways. Electromagnetic interference can cause severe damage to the functionality of fire detectors. This challenge has now been overcome. We solved the problem. It took us a lot of thinking, knowledge, skills and experience. Plus an extremely tiny amount of the right kind of electrically conductive compound.