Thanks guys! I'll do some cleaning and let you know how i make out.

Hello everyone!

I have some newbie questions. Bought the Yuletide Express HO set 3 years ago. Each subsequent year I add some tracks. This year, I would say it is now about three times the size as what it was out of the box. The problem is this year, after adding the tracks, the train moves erratically at first, if at all. Then once it gets going it is quite jerky , usually in the same areas of the track. After about 10 minutes, it gets up pretty close to what I remember from last year, and relatively smooth. It doesn't move below 20% on the dial though.

So I am wondering what the problem is. Could it be that the relatively inexpensive power source that came with the kit can't handle the extra resistance of the increased size of the track? Or is my engine in need of maintenance? I've never done a thing to it in the past three years. I only have it out for Christmas so its unused for most of the year.

Thanks, and Happy Holidays!