I have a cheap old AAA flashlight that had an alkaline battery leak in the tube. It's a cheap 5mm LED light, but I'd like to fix it and use it again, since an AAA will no longer fit in the tube, it gets stuck. I tried isopropyl alcohol, but not white vinegar, but that didn't seem to do the trick. Anyone fixed this problem before in a light? I need to remove the residue inside of the tube so a battery will slide in and out again.