Hello all, My wife has a rug or small carpet in her home office In front of her desk, and her desk chair sits on top of it. The problem is that her wheeled desk chair is always grinding the carpet, and their is always small white powder under it. I'm worried we are breathing it in but my wife doesn't want to throw it away. Can someone suggest a replacement I can buy for her. One that can sit under her wheeled desk chair but won't release white dust or anything else when it gets grinded by the desk chair. Thank you.