Got round to purchasing some brand new batteries today. Can’t get the remote in question to pair with the dongle, so suspect a bad dongle?
What do you see when you try to pair it?
I remove the dongle, hold ok and home until remote led is solid blue, re insert dongle, nothing happens, light stays lit.
You can contact email@example.com to arrange for a replacement.
This issue is now sorted thanks to the excellent support provided.