New to the forum. And before anyone mentions it, I've read about the quality of the Bachmann Plus line. Still, I got one nearly new for super cheap on ebay. It seems to run fine, except for one major, but weird, problem. The wheels are constantly slipping. I cleaned the wheels, the track, and it's not even pulling anything. It's like it's hitting icy patches on the track. Any suggestions, or has anyone even seen this before? I have 3 other locomotives (oldest is a Bachmann F9 from 1971) that all run fine without slipping. Can't figure this one out. It's the first low profile wheels engine I bought. Thanks in advance.