Good that you write these things.
We all make mistakes, often silly ones like your dome experience. My logbook has plenty of observations with errors like yours – it is easy to look away at the right – or rather wrong – moment.
I think we all learn from postings like yours, and this helps us to remember the basic things, check the equipment during the day, start up in good time, make things running and keep an eye on them etc.
Better luck next time.