Having trouble deleting objects from a list after they reach a certain scale.

I am almost done with this project but am stuck on the last part. Basically, the parameters for what I'm working on is as follows:

1. Instantiate one cube prefab every frame into the scene.

2. The cubes need to be named as “Cube1”, “Cube2”… based on the order they are generated.

3. The cubes need to be generated at a random locations within 1 unit from the origin [0,0,0].

4. Each cube should have a random color.

5. The cube size (localScale) shrink 10% in each frame.

6. When the cube’s scale is less than 10% of its original scale, the cube is destroyed.

   ---

I am stuck on six. The cubes are created, colored and named, and shrink over time, but will not destroy themselves after they shrink enough. I think I'm trying to reference the scale in the wrong way, because there is no console output about removing any cubes (which I put in there to debug)

Apologies if my code is sloppy, like I said I'm new to Unity and am trying my best haha. The troubled code bit is in the AddNewCube() function.

My code so far:

 using JetBrains.Annotations;
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class CubeCreator : MonoBehaviour
 {
     Vector3 origin;
     private List<GameObject> cubeList;
     public float targetScale = 0.1f;
     public float shrinkSpeed = 0.1f;
     // Start is called before the first frame update
 
 
 
 
     private void Awake()
     {
         cubeList = new List<GameObject>();
     }
 
     void Start()
     {
         origin = new Vector3(0, 0, 0);
 
     }
 
     // Update is called once per frame
     void Update()
     {
         AddNewCube();
     }
 
     private void SetRandCubeState(GameObject cube)
     {
 
         float randScale = Random.Range(0.8f, 1.0f);
         Vector3 randomScaler = new Vector3(randScale, randScale, randScale);
         cube.transform.localScale = randomScaler;
         Vector3 randomPosition = new Vector3(Random.Range(origin.x - 1.0f, origin.x + 1.0f), Random.Range(origin.y - 1.0f, origin.y + 1.0f), Random.Range(-1.0f,1.0f));
         cube.transform.localPosition = randomPosition;
         Renderer render = cube.GetComponent<Renderer>();
         render.material.SetColor("_Color", Random.ColorHSV());
 
     }
 
     private void AddNewCube()
     {
         GameObject newCube = GameObject.CreatePrimitive(PrimitiveType.Cube);
         cubeList.Add(newCube);
         SetRandCubeState(newCube);
         for (int i = 0; i < cubeList.Count; i++)
         {
             cubeList[i].name = "cube" + i;
             cubeList[i].transform.localScale = Vector3.Lerp(cubeList[i].transform.localScale, new Vector3(targetScale, targetScale, targetScale), Time.deltaTime * shrinkSpeed);
             if(cubeList[i].transform.localScale.x <= targetScale) 
             {
                 cubeList.RemoveAt(i);
                 RemoveCube(newCube);
                 print("cube " + i + " removed");
 
             }
         }
 
 
     }
 
     private void RemoveCube(GameObject oldCube)
     {
         Destroy(oldCube);
 
     }
 }