How do you delete itemrenderers in a spark Listform for mobile?

I've got a spark ListForm with a custom mxml itemRenderer, all the itemRenderer has is:

<s:Label text="{data.name}"开发者_如何转开发 />

When I run the profiler, the listform is not re-using the itemRenderers, the instances keep going up and up, I'm using an arrayCollection as the dataprovider. I even call the dataprovider (arrayCollection) .removeAll() and the display goes blank, yet the number of instances of the itemRenderer does not go down. I then run the garbage collector in the profiler, and the item renderers still stay in memory. How can I remove the itemRenderers from memory?

---

if you just want a label as an item renderer then in mobile applications it's recommended to use the LabelItemRenderer

---

Set the itemRenderer to null. When GC next runs, the item renderers in memory will be removed.