Blurry A30C

A30C work great to start with but then went blurry within a few weeks of purchase. Tried different quality settings, no change. Cleaned lens with isopropyl wipe, no change. Contacted help, they recommend resetting device and re adding it. Which I tried, and now can't add it as I assume the blurry image means it can't read the QR code to re add device. Anybody else able to help, or should I just return it for a refund??