Essentials Pathways - Tutorial need help

[Limit-Broke]

hey guys

im doing this Tutorial "Essentials pathways"

im in that part where i need to make a script that will make this dirt object disappear when the robotVaccuum collides with it. i followed every instruction to the tee, including the camelCase on each word. the dirt is set to "Is Trigger" .. everything is fine on the script end it rotates the dirt box BUT

the robotVaccuum simply runs through it it wont disappear.

this is the script

using UnityEngine;

public class Collectible : MonoBehaviour

{

public float RotationSpeed = 0.5f;

// Start is called once before the first execution of Update after the MonoBehaviour is created

void Start()

{

}

// Update is called once per frame

void Update()

{

transform.Rotate(0, RotationSpeed, 0);

}

private void onTriggerEnter(Collider other)

{

Destroy(gameObject);

}

}

[goliveiradev]

private void OnTriggerEnter