Novation MiniNova

When I bought this, I was looking for something to replace the MicroKorg in my setup because I'm not crazy about the MicroKorg's sounds.
The sound of the Mininova is not spectacular but probably better than MicroKorg.
However - I use it live, and now, exactly 1 year since I bought it, the 4 small knobs just change values on their own. I don't touch them, but the Mininova thinks they moved and reads their value every few seconds, therefore changing the parameters of the sound while I'm performing. I even programmed a sound where the knobs have no function to avoid this problem, but still the Mininova falsely detected some other change and cut my vocoder multiple times during a live show.
This is a deal-breaker. If I could return this, I would do it in a second. Stay away from this. As irritating as the MicroKorg is, it still never gave me this problem. And I own the MicroKorg for many years (without a flight case, just wrapped in a towel when I tour).
STAY AWAY AT ALL COSTS.

PS: It was kept in a flight case whenever traveling and in a non-smoking studio