I'm reading "Wake up and smell the coffee — the new way to train your brain/Loss of smell can signal a decline in mental health. David Robson discovered how to improve it" (London Times).
The author is only 39, so his ability to revive his sense of smell is very different from mine. He had luck with one of those smell kits where you sniff at various essential oils — eucalyptus, lemon, rose, clove. Keep trying. Practice smelling. I've already done that. Imagine telling blind people to look harder and deaf people to listen closely. What if that worked?