Does anyone have suggestions for getting the vivid memory of a bad smell to go away?

Find another powerful smell, and smell that. Every time I clean my cats litterbox, I rub some eucalyptus oil under my nose first so I smell that instead.

You could try putting a little bit of Vix vapor rub under your nose. That’s what we did in my Anatomy & Physiology classes when we were doing dissections.

Put on a pot of water and boil some cinnamon and apples, or bake some cinnamon rolls.

Sniff a jar of coffee beans. It’s what they use at the fragrance counter to ‘wipe’ customers’ paletes sampling perfumes.

Take a huge whiff of ammonia based liquid fertilizer.