I scrub my carbon steel pans with hot water and a dish brush. There’s usually a little bit of soap left on the brush from something else. Works great. They’re so slick at this point the water just beads off. No oiling afterward needed. Thorough rinse and they’re done.
Do not let a crust build on the interior of these pans. This is a huge mistake.
Belatedly, yes, I love their pans.
They were in Bloomingdale’s at one point, but then must have withdrawn from the US market.
I found them a few years ago at one of the TJX brands, and bought several.