Is that smell coming from the break room?
If the trash is emptied on a daily basis and the lunchroom still smells, maybe it's your garbage disposal. This can be one of those forgotten things that most people don't think about at work or that someone else will take care of it. There is a simple cure for smelly garbage disposals. You can use lemons or any kind of citrus fruit as a natural way to deodorize your garbage disposal. The acid in the fruit will also help disinfect the blades and walls. You can use the fruit peels or the whole fruit if you want, mixing it with a cup of ice is also effective and good for the blades as it helps loosen stuck on debris.
Ask your cleaning service if they could add this to your checklist if this is a regular problem in your office kitchen.
Have a terrific Thursday!