You need to get all of the battery fluid off your components. It's soluble in polar solvents like water, but try not to use water (the water in the vinegar took it off before, not the acetic acid itself). Pure alcohol, or even better, isopropyl alcohol or circuit cleaning fluids, will take it off best. If you don't have any of this you can use a little clean water on a cotton bud. Just dry it as soon as possible.