Might take a few more puffs to drown out stubborn flavors, but some flavors, like Anna said, are almost impossible to lose entirely (like mints).
Might want to try the ECF search function in upper right hand corner of this post. Could type in " cleaning a drop in coil". You could try cleaning the coil, some folks have had success and other not so much. The main thing, if you try to clean a coil, I would do it only after I thought it should be thrown away.