You can wash every item by hand using dish soap, brush, or sponge to scrub with rather than putting in a dishwasher. This method is easier and effective. There are somethings that you should take note of before start washing, you should not use hot water to wash cold glass shelves as sudden temperature change could shatter the glass. But for a tough, hard stain, use hot water and ammonia. Before scrubbing, dilute a little ammonia in hot water and put the item to soak. Make sure to wait for the shelves and drawers to dry completely before putting them back into the refrigerator.
You can wipe the inside of the fridge using any preferred cleaning solution. Make sure to not leave any spot or corner from cleaning using a clean cloth or sponge. It is better to use natural cleaning solutions than a strongly scented solution that could affect the smell of the food inside the refrigerator later. You can make your natural cleaning solutions by mixing 2 tablespoons of baking soda in 1-liter hot water. For tough stains or spills, you can try using a little white toothpaste for scrubbing the area.

Before cleaning the exterior it is important to unplug the refrigerator from its power source and then pull the fridge forward to access all the sides using an appliance glide if required to avoid scratching the floor. You can use an all-purpose cleaner and a towel to clean all the exterior surfaces. To keep the refrigerator in optimal condition you should clean condenser coils every six months. These coils and fans release heat back in the air and if these are covered in dust heat will not release properly causing the compressor to overwork in turn consuming more electricity. You have to be very careful when cleaning the coils without causing any damage. You can use a brush to gently remove dust from the coils and then use a vacuum with an attached brush to clean up the excess dust. Do not use any kind of cleaning solution for cleaning the coils.