Hi. I am renewing my interest in model railroading and need some help. I dug out the 4x8 railroad that I started with my son about 15 years ago. Right now its 2 trains, 1 running at a time. But my problem is that the loco wont run on the track, but runs slow with direct wires from the controller. Could it be from corrosion on either the track or power pick up on the locomotive? Remember its`been stored in a basement and how would I clean this up. Its an old Tyco set.