How can I effectively clean under the toilet rim to ensure thorough sanitation and hygiene in the bathroom?

To effectively clean under the toilet rim for thorough sanitation and hygiene, use a toilet brush with strong bristles and a disinfectant cleaner. Scrub vigorously under the rim, making sure to reach all areas. Rinse the brush frequently and repeat until the area is clean. Finish by flushing the toilet to remove any remaining debris.