I use Airscape stainless-steel containers to store both whole coffee beans and ground coffee, but I have yet to find a method of cleaning the containers that really gets rid of every trace of the coffee oil. I try not to be too anal, but when I change beans, like from a light roast to a medium one, I would like to start with a totally "clean slate." I've tried Lemon Joy, hot water and baking soda, soaking hot water/baking soda in the container overnight, and even antibacterial handsoap (which was probably a mistake!) Yet the smell lingers. Anyone have any advice? Thanks!