Applying shaving cream to the toilet area will help to remove urine smell. Smear shaving cream all over, let sit 15 minutes, then wipe away.
Spray shaving cream on the grout and let it sit for a few minutes while you go have a cup of coffee. ;) Next scrub with a toothbrush remove any stubborn stains. Wipe up with clear water and your grout should look like new. Wishing you the best.
Spray shaving cream on the dirty grout, leave it on for a few minutes, scrub with a small brush or toothbrush and rinse with water. Use a hand held steamer to loosen the dirt from the grout and scub with a small brush or toothbrush.