Ha-Ha....get a test for the Wu-Flu!! Losing your sense of smell is supposed to be one of the symptoms.I have some Blue Dot that's probably 30 years old. I smelled it and it really has no smell. What do I do now? LOL
But I just now sniffed a can of IMR 4227 that I've had for more than 20 years, part of that in my unheated shed, and it has a faint smell of Simple Green like @OXMYX said, it's OK. I only use it on occasion, but worked this summer for some .41 Mag loads.