Hello, I am new to the forum.  I recently bought the blue trackster truck on eBay and I am looking for information on cleaning and servicing it so it will run smoothly.  It will move about a half-inch if you tap it, but that's it.  I am not sure how to open it up, or what the inside looks like.  I thought I would ask for help before I broke it trying to service it.  Any advice would be appreciated.  Thanks.