Update image-cleaner.md

Author: CocoWang-wql

articles/aks/image-cleaner.md

@@ -4,7 +4,7 @@ description: Learn how to use Image Cleaner to clean up stale images on Azure Ku
 ms.author: nickoman
 author: nickomang
 ms.topic: article
-ms.date: 02/07/2023
+ms.date: 03/02/2023
 ---
 
 # Use Image Cleaner to clean up stale images on your Azure Kubernetes Service cluster (preview)
@@ -87,7 +87,9 @@ Image Cleaner does not support the following:
 
 ## How Image Cleaner works
 
-When enabled, an `eraser-controller-manager` pod is deployed on each agent node, which will use an `ImageList` CRD to determine unreferenced and vulnerable images. Vulnerability is determined based on a [trivy][trivy] scan, after which images with a `LOW`, `MEDIUM`, `HIGH`, or `CRITICAL` classification are flagged. An updated `ImageList` will be automatically generated by Image Cleaner based on a set time interval, and can also be supplied manually.
+When enabled, an `eraser-controller-manager` pod is deployed, which generates an `ImageList` CRD. The eraser pods running on each nodes will clean up the unreferenced and vulnerable images according to the ImageList. Vulnerability is determined based on a [trivy][trivy] scan, after which images with a `LOW`, `MEDIUM`, `HIGH`, or `CRITICAL` classification are flagged. An updated `ImageList` will be automatically generated by Image Cleaner based on a set time interval, and can also be supplied manually.
+
+
 
 Once an `ImageList` is generated, Image Cleaner will remove all the images in the list from node VMs.