I don't want to cheat the test... sabi kasi sa akin "regular cleaning daw ng tambutso", so I'm assuming this is part of maintenance. Do I nderstand it right? Once a month, three months or twice a year?

Bale... I just need to wash my tambutso with water and blow off the soot by running the engine. But I can have it done in gasoline stations. Will the casa do this also?