User Manual Airthereal MA10K-PRO Ozone Generator 10000 mg/h High Capacity O3 Machine

If you mean cleaning items after being exposed to the ozone generator - you can do it, of course, but it's simpler to just let the ozone dissipate. The smell stays for some time, and the ozone itself is an irritant, so don't enter the room immediately, by all means. But it also naturally decays. Just give it a little time.

I'm not sure but the whole plate should be lit. If you are handy you can unplug it open it up and see if there is any visible damage to the connections. If it is burned out you can contact the company and see if they can send a replacement of the element.

No, it will not trigger your smoke/carbon monoxide detectors.

Yes I would. And the smell of the ozone will come upstairs for a bit if your heat is on, it travels a little upstairs through the vents and ductwork with hot air heat. I left it on for 90 minutes, but was out of the house at work fo,r about 8 hours. You could smell it a little upstairs but it was not bad

We used it in a single family home, so I don't know how it would affect an apartment complex. Yes, it helped with all odors, paint, smoke, and pets.