What brand of dish soap and sponge do you use to clean “All-Clad” products? Thank you.

AllClad products are well made and very forgiving but they really sparkle after cleaning them with a stainless steel cleaner for pots and pans. I do this a couple of times a year.

Nothing special, just common sense and usual methods - as the pans are sturdy and tend to release food easily (even regular ones).
The manufacturer website or other "how to" websites can provide more detail.