In my office space we have a main trash can and "recycling" can in the break room. They are simply two bins, with the same color, that are hidden in a cabinet. Outside of the cabinet are two doors, one door saying "recycling" and the other saying "trash".

However, it seems the issue here is, more often than not, people are just constantly dumping trash into the recycling bin, and despite signs we've put up around the break rooms and cafeterias proclaiming "Please do not put trash in the Recycling Bins!" nothing has come to fruition and trash is still getting placed in recycling bins. We've tried color coded bins in the past; that didn't work either, so management has put just two identical bins of the same color. We've tried large symbols of bottles and other recyclables on one bin, and placing a picture of trash bags on the other bin, but this hasn't worked either.

What's the most user friendly way and easiest way to get people to put the right thing in the right bin?