You can put baking soda in some water and mix it. Pour it on the battery terminal and use a brush to clean it off. The water and baking soda will prevent you from breathing in any of the lead sulfate dust.Click to see full answer. Thereof, what is the white stuff on a battery terminal?A white powdery substance is normally, zinc sulfate or lead crystals. A blue and white powdery stuff comes from the corrosion of copper connectors. Aluminum connectors get corroded with aluminum sulfate. Another possible cause of corrosion will be thermal expansion due to over-filling the electrolyte with water.One may also ask, is white powder on battery dangerous? The white powder in alkaline batteries is potassium hydroxide which can irritate your skin and eyes so be sure to wear gloves and goggles before touching the batteries. To play it safe, working in a well ventilated area or wear a respirator as well. Consequently, how do you get the white stuff off a car battery? Mix a very small amount of water with some of the baking soda in a lid or small dish. Then, use the toothbrush to apply the paste to the terminals and clamps. Scrub thoroughly until the white substance disappears. If necessary, you can make use of steel wool to help remove the corrosion.How do I get rid of battery corrosion?Do this with the cotton swabs or toothbrush dipped in vinegar or lemon juice. The acid from these will help dissolve the corrosion from the device. Scrub with the swab or toothbrush to remove as much corrosion as possible. Any remaining residue can be removed with baking soda and a tiny bit of water.