My pleasure Mike!
After a honey do day, I put my new MTH SW-8 in the shop for some service. Cleaned up everything, shell, body, wheels, etc. One of the dirtiest "new" engines I've ever seen. The shell was very grungy. Some dish soap and scrubbing later....
The sound wasn't working so fearing the worst, I examined the board, no burned components, next I checked the speaker, found a broken wire....easy fix!
Dirt...
This was off of the wheels after running my Dremel with a wire wheel on everything. Contact cleaner gets all of the residue off.
Everything needed grease and oil, back on the rails, all good now