After the shower, you should rub those areas with unrefined apple cider vinegar (Bragg's is a good brand). You can dilute it with some water if you like. This will help your skin to balance its acidity.
Also you can use oil of oregano, which is nature's strongest antifungal agent. North American Herb & Spice is a good brand. Buy Oreganol (Super Strength) from them, and rub your skin with a few drops of this oil everyday until the area clears.