Hi Larry. Welcome to the forum. As you are asking about track cleaning already does this mean you have acquired a load of well used 2nd hand equipment that has had, and will have, extensive use outdoors ?
If so, to add to Greg's suggestions, also pay particular attention to the areas where the track components and other electrical equipment associated joins together. Make sure you clean up the track ends and contacts so the metal is bright and then reassemble them applying some form of water ingress protection to these joints (e.g. LGB/Massoth graphite paste) so that the ends do not tarnish and thereby result in diminished electrical conductivity between track sections now or in the future.
Also, before building your line, give some consideration to replacing any conventional track joiners (fishplates) with some form of proprietary track clamp devise (Massoth/Splitjaw) attached directly to the rail. These devices help in the electrical conductivity departement and also minimizing the risk of track formations working loose causing derailments over time.
Which accessories do you require help with ? Max