-= Time.deltaTime

Hello!

When holding down A my object rotates to the left, when i hold in D my object should rotate right but it does not:

 if (Input.GetKey(KeyCode.A)){    
             Debug.Log("left");
             Quaternion Temp = transform.rotation;
             Temp.z += Time.deltaTime;
             transform.rotation = Temp;
         }
         if (Input.GetKey(KeyCode.D)){    
             Debug.Log("Right");
             Quaternion Temp = transform.rotation;
             Temp.z -= Time.deltaTime;
             transform.rotation = Temp;
         }

When holding down D in game mode the object immideatly rotates 360 degrees and "shakes" when i continue holding down D. I want the object to gradualy get a negative rotation around the Z-axis when holding down D, just as i get when i hold down A (but the opposite).

What would i do to fix this?

Thank you!