Dip the cotton portion of the cotton-tipped applicator in isopropyl alcohol.
To remove any grease or dirt, rub the cotton portion of the cotton-tipped applicator back-and-forth across the connectors on the battery and terminal sides. Do not leave any cotton residue on the connectors.
Repeat at least three times.
Use a dry cotton-tipped applicator and repeat steps 3 and 4. Do not leave any cotton residue on the connectors.
Inspect the area for any grease or dirt and repeat the cleaning process if necessary.
After cleaning the battery connectors with bleach-based chemicals, follow the Battery Connector Cleaning instructions to remove bleach from the connectors.