I have on my desk, a bait box. Upon opening it I’m greeted with the undeniably strong smell of onion. Yet my cheese and spring onion sandwich is enclosed inside a knotted, air-tight sandwich bag. It’s not a defective bag. Either that, or every bag I’ve ever used has been defective. Could it be that onions produce the most penetrative fragrance on the planet?

Their staying power is something else too. If I cut them up, rub my fingers in a bit, then have a bath … I can still smell them on my hands afterwards.

So, Singletrackworld scientists. Why are onions so smelly?

Poor personal hygiene.

^^^^
Yes,they don’t wash often enough ,or use deodorant.

It’s onion gas <<<< science.

Oddly you can get nickel alloy metal bars for the kitchen, which when you use like a soap bar after handling onion/garlic completely removes the smell from your hand.