Yes, I would start by cleaning the wheels and the track. If that doesn't work, I would reset the decoder.
Simon
I'd also surmise that you have contact issues, either wheels to track or pickup from the wheels.
It takes an iron man to play with a toy iron horse.
My first instinct says reprogram the decoder. then check for contact issues. Best I got from what you described.
SHane
A pessimist sees a dark tunnel
An optimist sees the light at the end of the tunnel
A realist sees a frieght train
An engineer sees three idiots standing on the tracks stairing blankly in space
I got an HO scale Athearn Genesis DCC ICC Caboose about a year ago. The interior lighting and the red flashers do not work effectively and only occasionally flicker and have had any sound. The model ID for this caboose is ATHG 78503 (CB&Q). To my understanding, this has been a common problem with these type of cabooses from Athearn. I know that there is a way to alleviate this problem, but can't find out how. Any ideas?
Andy