A Smoking colleague is a Pest.

More so,when he spends half of his “quality time” in your cubicle. So, how do you get rid of stale cigarette smell?
You could get rid of stale cigarette smell from an ash tray by  sprinkling a quarter tablespoonful of baking powder ( soda bicarb) into it.

If you want to remove cigarette odor from a room/or your working area , simply burn a candle in it. Let it burn for a couple of hours and the smell will vanish.

Be careful to keep that filing tray away from the candle.

Here is a similar, yet a little time-consuming way to remove that smoke odor from your car interiors.

Click here to view the embedded video.