I think it would be so helpful if there was an option for hosts to have an environment free of unnatural fragrances and use of Fabric Softeners/Bounce and a way to indicate that on a listing.
In our own Airbnb we use natural cleaners only and a diffuser with essential oils for the environment. Lately when I have been travelling, I have had to search for the hidden Glade Plug-ins and rewash linens that have been treated with perfumey fabric softeners. I am really allergic to non natural scents and get immediate headaches.