Destroy particles after object with collision script is destroyed

Questions & Answers
1

The bombs are instantiated and get destroyed on contact and produce a nice effect, but the last bit of the code doesn’t get executed after the bomb with the attached script is destroyed. This leaves a bunch of particle systems in the Hierarchy after dropping bombs everywhere. How can I fix this?

#pragma strict


var explosionPrefab : GameObject;
var explosionDebrisPrefab : GameObject;
var explosionBasePrefab : GameObject;
var clone:GameObject; // initiate GameObjects
var clone1:GameObject;
var clone2:GameObject;
var clone3:GameObject;
var clone4:GameObject;
var clone5:GameObject;


    public function OnCollisionEnter(collision : Collision) {
        // Rotate the object so that the y-axis faces along the normal of the surface
        var contact : ContactPoint = collision.contacts[0];
        var rot : Quaternion = Quaternion.FromToRotation(Vector3.up, contact.normal);
        var pos : Vector3 = contact.point;
        clone  = Instantiate(explosionPrefab, pos, Random.rotation);
        clone1 = Instantiate(explosionDebrisPrefab, pos, Random.rotation);
        clone2 = Instantiate(explosionDebrisPrefab, pos, Random.rotation);
        clone3 = Instantiate(explosionDebrisPrefab, pos, Random.rotation);
        clone4 = Instantiate(explosionDebrisPrefab, pos, Random.rotation);
        clone5 = Instantiate(explosionBasePrefab, pos, rot);
        Destroy(gameObject.FindWithTag("duplicateBomb"));
   


        // Destroy the projectile effects
        yield WaitForSeconds(3);
        Destroy(clone);
        Destroy(clone1);
        Destroy(clone2);
        Destroy(clone3);
        Destroy(clone4);
        Destroy(clone5);
       
}
2

Try removing the yield, and use the Destroy command with the delay parameter :

// Kills the game object in 5 seconds after loading the object
Destroy (gameObject, 5);

public function OnCollisionEnter(collision : Collision) {
    // Rotate the object so that the y-axis faces along the normal of the surface
    var contact : ContactPoint = collision.contacts[0];
    var rot : Quaternion = Quaternion.FromToRotation(Vector3.up, contact.normal);
    var pos : Vector3 = contact.point;
    clone = Instantiate(explosionPrefab, pos, Random.rotation);
    clone1 = Instantiate(explosionDebrisPrefab, pos, Random.rotation);
    clone2 = Instantiate(explosionDebrisPrefab, pos, Random.rotation);
    clone3 = Instantiate(explosionDebrisPrefab, pos, Random.rotation);
    clone4 = Instantiate(explosionDebrisPrefab, pos, Random.rotation);
    clone5 = Instantiate(explosionBasePrefab, pos, rot);
    Destroy(gameObject.FindWithTag("duplicateBomb"));
     
    // Destroy the projectile effects
    Destroy(clone, 3);
    Destroy(clone1, 3);
    Destroy(clone2, 3);
    Destroy(clone3, 3);
    Destroy(clone4, 3);
    Destroy(clone5, 3);
}