If you find a yellow, white or green powder-like substance on your batteries, it’s a sign that your battery needs some deep cleaning. Those coloured powders are the first indicators of corrosion. It’s better to clean them before they stick to the batteries permanently and disrupt their working. Here are a few simple steps that you can follow while cleaning your battery terminals: 1) Open the hood of your vehicle and locate the battery. Then spot the positive and negative terminals on it. Carefully unclamp the negative terminal first and then the positive one. 2) You can either use a commercial cleaning agent or make one at home. Just mix together baking powder and water and use a brush to scrub the terminals. Then, rinse it with water. 3) Use a dry cotton cloth to wipe off the water from the battery. Now, apply a little petroleum jelly on the terminals. You can now reconnect the battery in the same way. Keeping your battery terminals clean do not only prevent corrosion but also helps to maintain its battery life.