I will never again make Alfredo sauce (pasta water, butter, parmesan) and leave it sitting to clean the next day in my Demeyere pan. Dried glue that needed a lot of effort to clean up. My bad for leaving it. And the whisk, it's a mess.
I may opt for a non-stick pan in the future. Or adding butter first, then pasta water, then parm to allow the butter to coat the pan.