sound toggle no longer working

I have a simple pong game with two sound toggles: one for the ‘beep’ sounds when the ball hits the paddles or walls and another for the sound of rain which I want to be on or off. The sound for the beeps works fine and the toggle for the rain (without the sound) worked until I tried to get the audio clip and audio source working then it stops. The Debug.log doesn’t even show the mouse click on the rain toggle now!

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class toggleForRain : MonoBehaviour
{
    // Start is called before the first frame update
        public AudioListener audioListener;
        public SpriteRenderer toggleRain;
        public SpriteRenderer rainOff;
        
        public AudioClip rain;

    void start()
    {
        rainOff = GameObject.Find("sunCloud").GetComponent<SpriteRenderer>();
        toggleRain = GameObject.Find("rainCloud").GetComponent<SpriteRenderer>();
        rainOff.enabled = false;
        AudioSource audio = GetComponent<AudioSource>();
        audio.Pause();
    }
    void update()
    { 
        if (Input.GetMouseButtonDown(0))
        {
            Vector3 pos = Input.mousePosition;
            Collider2D hitcollider = Physics2D.OverlapPoint(Camera.main.ScreenToWorldPoint(pos));
            if (hitcollider != null && (hitcollider.CompareTag("cloud")))
            {
                Debug.Log("cloud");
                if (!toggleRain.enabled)
                {
                    toggleRain.enabled = true;
                    rainOff.enabled = false;
                    GetComponent<AudioSource>().Play();
                }
                else
                {
                    toggleRain.enabled = false;
                    rainOff.enabled = true;
                    GetComponent<AudioSource>().Pause();
                }
            }

        }
    }
}

Here’s the inspector for the image over where the rain toggle is:

I can’t upload it right now. Error parsing the file!

I’ve finally managed to upload a snip of the inspector
alt text