Hi lads, what's the best way of cleaning track? I've been running 220 and 177, and they aren't running that well, especially 177. I think it's probably because of dirty track, as I haven't used the layout in a while. I was thinking of getting one of those track cleaning wagons, but I've heard they're only really good for maintain clean track rather than actually cleaning dirty track. Any basic suggestions that don't involve me having to buy anything would be especially welcome!