hold on a sec po...
OZONE machine is different from IONIZER machines.
Please don't confuse the two.
Ozonators or ozone fogging machines produce O3 gas by adding a single molecule of oxide into our air (O2). Since organic matter doesn't survive in an O3 environment, organic odors are eliminated. The car is usually sealed when the ozonator is ran, then it needs to air out before anyone can enter the sealed premises. Ozonators are NOT harmful if no body is present when the machine is ran.
Ionizer simply releases a negative ions that attract itself to positive odor ions, thereby cancelling each other and removing the odor. This is TOTALLY harmless. It's being used extensively in hospitals, hotels, bars/clubs, etc. Go to the billiard hall in Rockwell, they have a big one there.
http://www.djclarke.co.uk/file08.html
Somewhat expected from a rushed car from a first time carmaker
Xiaomi E-Car