Put your clarinet in the case.......
....when you are done practicing!
I hear so many students and parents say "if I leave it put together it will be easier to start practicing".
It takes less than a minute to put your clarinet together.....yes, even if you have to use cork grease!
Leaving it out of the case is really NOT a good idea. Why? It can get damaged VERY easily. Bent keys, broken mouthpiece, dust, dirt......do you have a pet, or a young sibling?
Take good care of your clarinet!