Long ago we used cigarette paper. The same paper is now accessible as pad drying paper so that young scholars may get it easily from music stores. Drying the clarinet effectively will keep it clean and likewise help prevent cracks from developing in a wood bodied device. Teaching this to students who have plastic clarinets might help be sure that they continue to dry their gadgets thoroughly when they at last step up to wood. Make sure that your youngest students know how to place the parts of the instrument back into its case accurately. The upper and lower joints must fit into the case in the correct direction in order for it to shut correctly, and the case should not be forced shut like an overstuffed suitcase. If the pieces are of their proper positions, the case should close securely but easily. The mouthpiece should be placed in the case with the ligature on it, and then the mouthpiece cap will be placed over both, with care being taken not to nick or crack the facing of the mouthpiece by hitting it with the cap. I prefer plastic caps because of this. It is best to take the reed off the mouthpiece before storing it. Reeds left to dry on the mouthpiece can warp, as a way to make them play badly in little or no time.