1. Place your left index finger on the E/F key.
2. Place your left middle finger on the B flat/C key.
3. Place your left thumb on the register key.
Ensure that the pads on these keys fully cover the holes to obtain the correct pitch.
Here are some additional tips for playing E# on the clarinet:
* Keep your fingers relaxed and close to the keys. This will help you move them quickly and accurately.
* Blow into the clarinet with a steady stream of air. The air should be directed into the mouthpiece at a slight angle.
* Listen carefully to the pitch of your E#. It should be in tune with the other notes in the scale.
* Practice playing E# until you are comfortable with the fingering and can play the note consistently.