I washed out a clearomizer that had apple in it and dried it. I then put coffee in it - apple flavoured coffee is disgusting. Some things with wicks are very difficult to clean or swap if they have had strong pervasive flavours in them. So Apple, Mints, Menthols, Cinnamon etc need separate devices in my book, if you are using any sort of tank. Cartomizer tanks are simpler - wash the tank, use a new cartomizer. Atomizers are the simplest to clean - wash in water, Milton solutions or vodka (going up the grade of cleaning materials) to get rid of flavours.