Character getting stuck on walls

Hey,

I have a weird issue where if I jump and hold the movement direction key of the direction I'm jumping in - the character just sticks to the wall. Only when I let go of the movement control, my character stops sticking to the wall. So is there a solution to this? From what I've read, I tried messing around with physical material - and had no luck. It was also suggested that i use Addforce, but the movement speed is too slow- so not desirable.

 using System.Configuration;
 using System.Runtime.InteropServices;
 using UnityEngine;
 using System.Collections;
 
 public class TouchControlManagerWithJump : MonoBehaviour
 {
 
     public GameObject leftController;
     public GameObject rightController;
     public GameObject jumpController;
     public GameObject playerFinder;
 
 
     // Use this for initialization
      void Start()
     {
         //We assign Left and Right GuiTextures to leftController and rightController
         leftController = GameObject.Find("Left");
         rightController = GameObject.Find("Right");
         jumpController = GameObject.Find("Jump");
     }
 
      void FixedUpdate()
     {
         //We assign our main player to playerFinder
         playerFinder = GameObject.Find("pig_test");
 
 
         //Here we create a variable that checks if the player is grounded
         var groundCollisionDet = playerFinder.GetComponent<PlayerGroundDetector>().playerIsGrounded;
 
         //Creating touch controls
         if (Input.touches.Length > 0)
         {
             for (int i = 0; i < Input.touchCount; i++)
             {
                 //setting right touch movement
                 var touch = Input.GetTouch(i);
                 if (this.rightController.guiTexture.HitTest(Input.GetTouch(i).position))
                 {
                     if (touch.phase != TouchPhase.Ended && touch.phase != TouchPhase.Canceled)
                     {
                         if (groundCollisionDet == true)
                         {
                             /*  
                             old controls with acceleration
                             playerFinder.rigidbody.AddForce(Vector3.right*10, ForceMode.Acceleration);
                             playerFinder.rigidbody.velocity = Vector3.ClampMagnitude(playerFinder.rigidbody.velocity, 10f);
                             */
 
                             //Create a vector 3 and attach playerfinder's rigidbody.velocity to it. Giving it a value.
                             Vector3 playerRight = playerFinder.rigidbody.velocity;
                             playerRight.x = 3;
 
                             //Assigning playerRight to playerfinder
                             playerFinder.rigidbody.velocity = playerRight;
 
                             //Player faces the direction it's moving
                             playerFinder.rigidbody.rotation = Quaternion.LookRotation(Vector3.left);
 
 
                         }
 
                         else if (groundCollisionDet == false)
                         {  
                             Vector3 playerRightAir = playerFinder.rigidbody.velocity;
                             playerRightAir.x = 3;
                             playerFinder.rigidbody.velocity = playerRightAir;
                             
                              
                             playerFinder.rigidbody.rotation = Quaternion.LookRotation(Vector3.left);
                             //playerFinder.rigidbody.AddForce(Vector3.right * 5, ForceMode.Acceleration);
                            
 
                         }
 
 
                     }
 
 
                     else if (touch.phase == TouchPhase.Ended)
                     {
                         playerFinder.rigidbody.rotation = Quaternion.LookRotation(Vector3.forward);
 
                     }
 
                 }
 
                 else if (this.leftController.guiTexture.HitTest(Input.GetTouch(i).position))
                 {
                     if (touch.phase != TouchPhase.Ended && touch.phase != TouchPhase.Canceled)
                     {
 
                         if (groundCollisionDet == true)
                         {
                             //We do the same here but this time we use '-3' so the player goes the opposite way
                             Vector3 playerLeft = playerFinder.rigidbody.velocity;
                             playerLeft.x = -3;
                             playerFinder.rigidbody.velocity = playerLeft;
 
                             playerFinder.rigidbody.rotation = Quaternion.LookRotation(Vector3.right);
 
                         }
 
                         else if (groundCollisionDet == false)
                         {  
                             Vector3 playerLeftAir = playerFinder.rigidbody.velocity;
                             playerLeftAir.x = -3;
                             playerFinder.rigidbody.velocity = playerLeftAir;
                             
                             //playerFinder.rigidbody.AddForce(Vector3.left*5, ForceMode.Acceleration);
                             playerFinder.rigidbody.rotation = Quaternion.LookRotation(Vector3.right);
                         }
 
                     }
 
                     else if (touch.phase == TouchPhase.Ended)
                     {
 
                         playerFinder.rigidbody.rotation = Quaternion.LookRotation(Vector3.forward);
 
                     }
                 }
 
                 
 
 
                 else if (this.jumpController.guiTexture.HitTest(Input.GetTouch(i).position))
                 {
 
                     if (touch.phase != TouchPhase.Ended && touch.phase != TouchPhase.Canceled)
                     {
                         if (groundCollisionDet == true)
                         {
                             Vector3 playerJump = playerFinder.rigidbody.velocity;
                             playerJump.y = 4;
                             playerFinder.rigidbody.velocity = playerJump;
 
 
                         }
 
                     }
 
                 }
 
 
             }
 
 
         }
 
 
 
 
 
     }
 }