Toilet bowls require caulking at the base to provide a water-tight seal preventing liquid or moisture from getting underneath it and festering.
Often times an installer will skip this step, does it wrong, and/or the caulking simply fails, as seen in the image below:
The next image is the same toilet re-caulked properly. Caulking of any kind is only as good as the surface we give it to adhere to. It’s important to remove any & all loose debris and clean the surface with a good all-purpose kitchen & bath cleaner – preferably one with a degreasing agent.
A common complaint from our clients is a consistent “skunky” odor coming from the toilet area. Without a proper seal at the floor any liquid that gets on the floor near the toilet can run up to and underneath the toilet bowl including the occasional “miss” by little Johnny!