Fascinating turn the thread has taken.
Re sinus issues - I used to suffer terribly from this - hydration helps (enormously), as does Olbas Oil (eucalyptus) and a completely smoke free environment.
When I was a student, people smoked everywhere, in pubs, coffee shops, cinemas, cars, buses, and in their own homes.
My sinuses - which were extraordinarily sensitive to, and violently allergic to - cigarette smoke (and cannabis, for that matter, one of the worst sinus attacks I had in my entire life occurred at a party a few decades ago where many of the others - guests and hosts both - smoked cannabis; I retreated to the kitchen, where I spent some of the following hours simply blowing my nose non-stop into vast quantities of kitchen tissue paper) - enthusiastically applauded each and every extension of the ban on smoking.