Problem to clamp a rotation with touch input

Unity Engine
,
1

Hi everyone.
I try to rotate a gameobject with the touch input and try to clamp the x rotation but the dont work how i desire, if i drag from the top to the button it rotate well, but if i drag from the button to the top (when reach the 0 valeu in rotation x in inspector) it start flickering and it returns to a rotation over +40.

this is the code

public class Visualizzatore3D : MonoBehaviour
{
        public GameObject objectToRotate;

        private Vector3 _touchPosition;
        private Quaternion rotazione = Quaternion.identity;
        private float _scaleFactor = 1f;
    float initialXRotation;


    private void Start()
    {
        initialXRotation = objectToRotate.transform.localRotation.eulerAngles.x;
    }

    private void Update()
    {
        if (Input.touchCount == 1)
        {
            Touch touch = Input.GetTouch(0);
            if (touch.phase == TouchPhase.Moved)
            {
                float rotationSpeed = 0.2f;
                float rotationX = -touch.deltaPosition.y * rotationSpeed;
                float rotationY = -touch.deltaPosition.x * rotationSpeed;

                Quaternion newRotation = Quaternion.Euler(rotationX, rotationY, 0);
                newRotation = objectToRotate.transform.localRotation * newRotation;
                float clampedAngle = Mathf.Clamp(newRotation.eulerAngles.x, -45f, 45f);
                //Vector3 clampedEuler = new Vector3(clampedAngle, newRotation.eulerAngles.y, 0);
                objectToRotate.transform.localRotation = Quaternion.Euler(clampedAngle,newRotation.eulerAngles.y,0);
            }
        }

}

Thanks to everyone!

2

i think that the problem is that the clamp function give a float value from that range -45 to 45, but the eulerangle give value from 0 to 360…

3

Please someone can help me!