Howdy and Merry Christmas. We (wife aka "BOSS") and I have Christmas Village goes up once a year. Always  clean every piece of silver track before putting into operation and as taking down after holidays. This year the smoke unit doesn't function. Have tried carefully to clean the unit with no success on smoke generation. Engine runs fine and pulls 3 -7 Spectrum heavyweight passenger cars with no problems. Smoke is a big thing for us.
If the engine doesn't smoke then it doesn't give friends, family or us the enjoyment we expect. Yes, wrote a book, sorry for that. Any ideas on getting the smoke unit working would be greatly appreciated by this "rookie" HO train operator and his wife ("BOSS").
Smiles, Gods' Blessings,
Frank aka "BIGFINGERS"