I contacted support and they referred me to this site
Having read that and many other web pages trying to resolve the issue they gave me the link to return it.
It was a gift through Amazon so I returned it for Amazon credit. I will not buy another Anova after reading all the other people that had the same problem and that it can be caused by steam.
It's a shame as they are on the cusp of having a good product.
I'd guess poor senior management