There is a chance that could be the case- as we are on a well and I used our water- and not distilled water. The well water here tastes fantastic, and we don’t have a lot of mineral buildup in our sinks/ tubs/ toilets.
But
In my experience, mineral buildup is “hard”, and this seemed more like...
We have been running staggered hatches (2-3 weeks apart generally) most of the summer.
We have 2 HovaBator forced air incubators. One w auto turners, a 1588, and 2370 as a Hatcher. Both w humidikits.
The Hatcher gets shut off, cleaned, has time to dry out- and gets set up again 2-3 days...