1. Use the fingering: left-hand index, middle, ring, and pinky fingers; right-hand index, middle, and pinky fingers.
2. Alternate fingering: Use the fingering: left-hand index, middle, and pinky fingers; right-hand thumb, index, and pinky fingers. This fingering may provide a more in-tune E sharp.
3. Embouchure adjustment: Slightly raise your lower jaw and tighten your embouchure to produce a higher pitch.
Remember to practice and adjust your technique to achieve the desired sound and intonation.