Compiler Error CS0120, GUIText

 using UnityEngine;
 using UnityEngine.UI;
 using System.Collections;
 public class triggerZone : MonoBehaviour {
     public AudioClip lockedsound;
     public Text text;
     public static bool inside = true;
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
     void Update () {
         
     }
     public void OnTriggerEnter(Collider Col){    
         if (Col.gameObject.tag == "Player") {
             inside = (bool) true;
             if (inventory.charge == 4) {
                 transform.FindChild ("door").SendMessage ("DoorCheck");
                 if (GameObject.Find ("chargeHUDGUI")) {
                     Destroy (GameObject.Find ("chargeHUDGUI"));
 
                 }
             }  
             else 
             {
                 AudioSource.PlayClipAtPoint (lockedsound, transform.position);
                 Col.gameObject.SendMessage("HUDon");
                 TextHints.SendMessage("ShowHint", "This Door is locked, I need to power it!", UnityEngine.SendMessageOptions);
 
                     
                 }
             
             }
             
             
         }
     }
 

As you can see, this script sends a message to the Object (I think? I'm new to this. .3.) ShowHints, however, apparently, ShowHints is nonstatic, even though I made it static..?

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class TextHints : MonoBehaviour {
     public static Text text;
     public float timer = 0.0f;
     
     // Use this for initialization
     void Start () {
         text = GetComponent<Text>();
     }    
     
     // Update is called once per frame
     void Update () {
         if (text.enabled) {
             timer += Time.deltaTime;
         }
         
         if (timer >= 4) {
             text.enabled = false;
             timer = 0.0f;
         }
         
         if (triggerZone.inside == true && inventory.charge < 5) {
             text.text = "Not Enough energy, the blasted pixies have stolen it!";
         }
     }
     
     static void ShowHint(string message){
         
     text.text = message;
         
         if(!text.enabled){
             text.enabled = true;
         }
     }
 }

Did I not make it static? How can I set up an object reference? Here is the full error:

Assets/scripts/triggerZone.cs(31,43): error CS0120: An object reference is required to access non-static member `UnityEngine.Component.SendMessage(string, object, UnityEngine.SendMessageOptions)'