The problem began a couple of days ago when it stranded my wife. I went to her and disconnected the positive battery cable did a little cleaning on the connections which really didn't looked like it needed it but when I reconnected it the car started and she made a few more stops with no problem. Yesterday we went to leave the house and it wouldn't start. I thoroughly cleaned both connections and it wouldn't start. I then added water to the battery since it was a little low and charged it for several hours and it still wouldn't start. I turned the lights on last night and they seemed plenty bright but it wouldn't start. It wouldn't even try to turn over, I did here like a hum or something when I tried to start it. Well this morning I go out and try to start it and it fires right up. Can some of you experts give me some advice because I've got a feeling it's not over yet. Thanks ahead of time.