Rub a dry Scotch Brite heavy-duty scrub sponge gently across the skillet, following the grain of the aluminum. Calphalon recommends the Scotch Brite pads for its line of hard-anodized aluminum.
Sprinkle Bar Keeper’s Friend on any stains on the inside or outside of the skillet. Bar Keeper’s Friend is a powdery cleaner safe for use on a variety of surfaces and is recommended by Calphalon. Add warm water and hand wash the skillet with a Scotch Brite heavy-duty scrub sponge, rinsing thoroughly when done.
Squeeze a few drops of liquid dish soap into the bottom of the skillet if you have stuck-on food or other stubborn stains. Fill the skillet with water and leave the mixture soaking for at least 10 minutes. Rub a soft-bristle brush over the stuck-on foods and rinse with more water.