I can't remember the last time I used it to be honest as I don't think it's something you'll find in a BIR Kitchen.
Something I did note yesterday though. When I first bought the jar and smelt the contents, you could certainly smell an underlying almost onion smell along with its very Chemistry Lab over all smell.
Yesterday when I went to have a look at the ingredient list, my eldest dughter had a friend over and both were inquisitive as to what it was. So I let them smell it and asked them to describe it. Neither was able to, having got past the initial pong.
Before explaining it to them I smelt it again. I couldn't detect any onion smell in it at all this time. Just its odd Chemistry Lab smell.