Stainless steel has been used for smoking screens for decades with no health or safety issues. Smojo is made of surgical quality stainless steel and cannot be burned with a standard lighter. This steel has been extensively studied and is safe if used as directed. Do not touch Smojo when it is hot. (Smoking is known to cause a variety of health problems.) Smojo has no holes that can permanently clog. It uses dynamic apertures created by the geometry difference between the Smojo head and the pipe bowl. These apertures change each time you use Smojo. If you cannot draw easily after cleaning Smojo, you can clean your Smojo and reuse it.