iPod 5th Generation not connecting to wifi - no problem for iPhones and iPads in house
So my daughter's iPod 5th Generation (bought April 2014) has started to be VERY tempramental on wifi in our house. Generally it wont connect to either our Sky Hub or our TPLink powerline extender. After resetting it sometimes it works then quickly fails again.
I have hard reset, reset the network settings and also scrubbed it and restored from back-up. I also have updated to iOS 9. All other iPhones and iPads in the house connect fine.
Can anyone suggest anything or is this a trip to Genius Bar? Frustrating as its >1yr old so out of warranty!!
Thanks
iPod touch, iOS 6