I noticed a significant amount of blue-green corosion on the + positive battery terminal. All auto articles I’ve read say to disconnect the cords to be sure you clean all the corosion off. Would it be helpful if instead I just cleaned the surface corosion off? The reason I’m hesitant is because I’ve never attempted to disconnect the cables and heard that sometimes it causes problems (such as the performance chip resetting, etc). It’s likely that I don’t have the right tools (or arm stregnth) to handle the task. Nor do I have the money to take my car into the shop. I have a maintenance free battery if it makes any difference. I appreciate any advice, thanks.