So basically you would need to burn your sinuses and lungs with hot steam. You do even realize that the heat to destroy the virus (60°C) is enough to blister your hands? You don't really want to blister your lungs to fight off a virus.
Burning your lungs will also make them weaker against viruses and bacteria. You'll eventually be worse off.
RE: THE EASIEST WAY TO KILL CORONA VIRUS