I was never any good at soccer, but I loved getting my soccer boots ready. The aroma of Dubbin was gorgeous! These days, it smells like stale shoe polish. No joy at all!
Kerosene/Paraffin had an unmistakable aroma. These days, it is more like road tar.
Penetrol was another liquid that was immediately recognisable. Now it is sort of kero , but not quite.

Even my feet don't smell as sweet; what's going on?