[Second Amendment First]

... no one knows if the dogs can smell those trace amounts.

But if you have a substantial amount of cash (which is what they are looking for) all those traces add up to something a drug sniffing dog would would detect.

[microgood]

But if you have a substantial amount of cash (which is what they are looking for) all those traces add up to something a drug sniffing dog would would detect.

That could very well be. I do not know what levels are required for a dog to detect it.