If statement not working inside switch statement

Here is the code I'm using

 private void OnTriggerEnter(Collider other) // Player interacts with objects when he enters colliders 
     {
         switch (other.gameObject.tag)
         {
             case "Green":
                 print("Green Crystal!");
                 if (Input.GetKey(KeyCode.Space)) // The If statement is not working for some reason
                 {
                     Destroy(green);
                 }               
                 break;
 
             case "Blue":
                 print("Blue Crystal!");
                 if (Input.GetKey(KeyCode.Space))
                 {
                     Destroy(blue);
                 }
                 break;

For your information, the print function works yet when it comes to the if statement, nothing happens.