When I took it first I had the impression that it was nice and strong, but over the course of last week, I noticed that:- no matter how tight I closed the lid, there was some strong garlic smell still coming through the lid and even through some additional plastic bag. The smell was already in the box when the bottle arrived in the sealed packaging.- the garlic smell is not like fresh garlic but more like old garlic, which my wife didn't like at all and hence she ultimately forced me to refrain from using it or get divorced- when I tested it on a clean white paper it left a greasy mark even after hours and didn't disappear like 100% clean essential oil