How do I remove a smoke effect?

[cfrag]

With trigger.action.effectSmokeBig() I can very conveniently place a fire with a smoke effect of configurable density. Is there any way that I can remove that effect? I would like to first replace a big fire with a smaller one, and then, after a while remove it completely, simulating that the fire has burned out or was extinguished. How can I access that effect object (I'm assuming it's a static object)?

 

Thanks for any pointers,

-ch