If you have ceramic tiles, take extra caution when cleaning soap scum. Use non-abrasive cleaner to avoid scratching the floor.
Step 1 - Cleaner
Using a non-abrasive cleaner is key. Spray it directly to the soap scum on the tiles and let it soak for 10 minutes before moving to the next step.
Step 2 - Wipe
After you have it allowed the cleaner to soak, use your sponge to wipe the surface. Repeat several times to remove all of the soap scum.
Step 3 - Rinse and Wipe
Once you are satisfied, rinse the ceramic tile surface and wipe it with a clean towel.