When is the best time to give the bathroom a good cleaning? Right after you shower, when surfaces like mirrors, faucets and countertops will likely have a fine layer of steam on top of them from the hot shower. With just a microfiber towel, you can wipe these down quickly as the towel absorbs grime, dirt and bacteria. And the grout in the shower? All the grime and dirt on the grout is considerably looser after a hot shower -- just scrub and rinse in minutes.