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.