Hot off the presses, a little good news about anosmia, loss of smell. https://archive.is/dqhGD
tldr: While colds, flu, sinusitis can all cause loss of smell due to one mechanism, obstruction and swelling, Covid 19 has another mechanism. It attacks the substrate supporting the olfactory nerves. This can even lead to loss of the peripheral olfactory nerves. The somewhat good news is that they regenerate. The not so good news is that it takes a long, long time. And though it doesn't say so here, possibly in some cases the substrate destruction can't be overcome.
Mine is on the mend, but it is taking a long time. It is much less unpleasant to change the cat litter box though.
Costco, Scoop Away, 42lbs, I've tried all the rest including the homemade concoctions, nothing else can even touch this. Not expensive at all. I know exactly what you mean, the major brand names, gagging and eyes watering, lol, no more of that.
Dr. Elsey’s Cat Litter is the best I’ve used. Clumps well and odor isn’t an issue.