[bsder]

> We've tried nothing, and it didn't work. Time to move on.

Uh, yeah, no.

Offices are havens of particulates, volatile organics, carbon dioxide, etc.

How long does it take that burnt popcorn smell to disappear from your office? That gives you an idea of how bad your office is.

HVAC systems can have HEPA filters, UV lights, good air exchange, etc. But the cheap ones don't. And, without pressure, nobody is going to install good ones.

Welcome to the pressure.