My wife ran my one of a kind, handmade, tamahagane steel knife through the dishwasher. She load and unloads the dishwasher now, but she hasn't run it since.
surely she's attacking the wrong problem? the issue wasn't that she ran the dishwasher in the first place, it was that she loaded the wrong item into the dishwasher.
if this story is true, then she should avoid loading the dishwasher. running it or not is immaterial.
I cook mostly in cast iron and have never attempted this, but I imagine a decently seasoned pan would survive pretty unscathed, wouldn’t it? I have the sudden urge to try.
I’ve heard that modern dish soaps don’t strip the seasoning from cast iron, but soaps with lye, or acids (including acidic foods) will. And you are apparently supposed to indeed yes wash the pans with soap when you use them. But if your dishwasher detergent is acidic or has any sort of booster for hard water you might want to just skip the test unless you need to reseason anyway
I don’t cook with cast iron, so do not take that as gospel truth. I use stainless which I season sort of similarly, and honestly haven’t noticed a difference.
It's totally fine if you have a good seasoning on there. The soap thing is largely a myth. I wash mine with soap every time I use it and it's still slick as ever