What you need:
Step 1: Mix a paste of baking soda and lemon juice. (Water can be substituted for lemon juice but lemon juice is a great disinfectant and great at removing odors.)
Step 2: Spread the paste along the bottom of the toilet, just where the toilet meets the floor, and a little further up if need be, the toilet seat and any area that gets a lot of spray. Let it sit for 10-15 min.
Step 3: When time is up spray the paste with vinegar and let is fizzle. Once it stops fizzling wipe it off with a damp rag. (Don’t forget the walls and baseboards as well)