I bought my 9 year old a starter set for Christmas. HO scale. It has two engines. One runs great. The other is a bit "sluggish". I feel like the wheels/axles need lubrication but not sure if that's it or what to use if it is. Any advice? Thanks, Sam
Don't apply lubrication to the wheels, you can clean them however. Try applying some grease in the gears, although from the factory it is usually adequately lubricated.
More details may produce a little more assistance. What set is this?