All returns are inspected once received, this includes if you believe one of your items may have a manufacturing fault.
When returning a store purchase to store, a staff member will assess the item to determine whether the issue is a manufacturing defect or the result of normal wear and tear.
If the staff conclude that the fault is due to wear & tear, and you wish to challenge this further, you would need to arrange for the item to be inspected by a reputable third party. Upon providing a headed letter or email from the third party confirming a manufacturing fault, you can return to the store for further support.