There seems to be a lot of differing opinions out there on what is best practice. A lot of people seem to be shying away from the wet sponge due to the thermal stress it imposes on the tip. I have personally always used the brass sponge only, but my Hakko station came with both a "wet" sponge and a brass sponge for cleaning.
What are the differences between the two cleaning devices? How should I decide which one to use given the type of work I do?
Best Answer
Wet sponge: Cheaper, less abrasive.
Brass wool: Removes "debris" better, smaller thermal shock (drop of temperature can be more of an issue than cracks/wear depending on your iron), you don't have to pour water whenever you start soldering.
I personally prefer the brass wool, cleans better, no water pouring, doesnt affect the temperature of the tool so much (although it still drops it a bit).