.. my dear colleague!
I don't know what kind of colleagues you have but I hope they are not like the pigs that work at my present employer. See the tow images below take in October and November of this year.
We have a companmy restaurant where you can get various sandwiches, soup, fruit and the lot. That is all great and you can also take the food up to your desk, because you decide to have meeting over lunch or you are so busy that you eat at your desk while working and filling up your keyboard with bread crumbs. All that is very good. It's good working spirit.
But please take back your dishes and don't just put them on the floor of the pantry!
Hope you all are better of with better colleagues.