The automatic powder is agressive, I have no experience with that. I use the liquid dishwasher as used for manual dishwashing. About 5% dishwasher fluid is all that is needed. In addition, you can mix in other fluids like ammonia or methanol, depending on what you need to do.
Aftr the US cleaning it needs in most cases to have some surface protection, because all of it is removed by the cleansing compounds.