Get some good attys to drip in. that's what most do. Even a regular 2.5 ohm joye 510 atty is very good for testing a few drops. I personally like the IKNVape 1.7 ohm attys for this, but a regular Joye is perfectly fine.
You can also drip into your clearo with the tank empty. A couple drops on the coil at the top. It should all vape out...unless it is really strong and nasty, or a mint. Then you gotta wash it.