Deleting image when products deleted

[kingstyle]

Hello, i have VM 2.0.x and 2.6..
I noticed that, when i delete a product, the image of that specific product is still on my server after deleted product.
How can i remove my orphan images from the products that i have deleted?

How can i set quality when i upload an image? or change the size of the product image ? 

Mod edit:  impatient bump message removed. Please read http://forum.virtuemart.net/index.php?topic=104795.0