Teaching this to scholars who have plastic clarinets will help be sure that they proceed to dry their contraptions entirely after they at last step up to wood. Make sure that your youngest scholars know the way to place the parts of the device back into its case accurately. The upper and lower joints must fit into the case in the correct direction in order for it to close properly, 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 will be placed in the case with
the ligature on it, and then the mouthpiece cap can 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 for this reason.