AC-STC Solder Tip Cleaner & Accessories Metcal AC-STC Solder Tip Cleaner extends the life of a solder tip by removing any oxidation. By placing the tip into the opening, the tip cleaner senses the tip and automatically activates for easy operation. The replaceable brush system pulls excess solder away from the tip and into a removable collection tray for disposal. This process also removes oxidation from the tip. A splashguard prevents debris from escaping the collection area. Metcal AC-STC Solder Tip Cleaner features a compact footprint, quiet operation, and a universal power supply for flexibility.