I've found that elevating my mini off the surface can help. More important is keeping it away from other metal objects, including drives, hubs, cables, speakers and metal pipes. It does not like 90 year old homes with plaster and lath. One wall can be enough to kill. My mini is near a window. Headphones won't lose it til I'm at the other end of the block. Inside, it's touch and go everywhere but the room containing the mini. The Bluetooth range problem first showed up on my 2007 mini. 2005 mini had Bluetooth so primitive that it doesn't show up anywhere without a dongle. Even then, you have to re-pair anytime you got your device near it.