Sometimes your dishwasher may smell funky when you open its door. But your dishwasher is one of the last places you want strange odors to come from. Many dishwashers may develop smells of mold or mildew over time because of the accumulation of grime. So you will need to clean your dishwasher to remove the dishwasher smell.
If you want no dishwasher smell, first, you can try by scrubbing your dishwasher. You can locate the drain filter, which is usually at the bottom of the dishwasher, and clean it. It is probably cylindrical and detachable through which all of the water drains. To access the filter, remove the bottom rack of the dishwasher then twist out the filter. For cleaning the filter, wash the filter with hot water and soap in your sink. To reach all the interior sections and crevices, use a bottle brush rather than a sponge. The drain filter is most likely responsible for the strange odors you smell. If food particles are in there, over time, in a warm and moist environment the dishwasher provides, they can rot and produce odor.
If cleaning the drain filter does not remove the dishwasher smell, you can wash the inside of the door and the interior walls. The smell in your dishwasher may have come from the grime that has accumulated inside of the dishwasher. Therefore, scrubbing the whole dishwasher may be the solution.
First, remove the racks that are inside the dishwasher so that they will not get in your way when washing the interior of the dishwasher. Use a sponge or a brush with hot soapy water to scrub the whole interior of the dishwasher. If grime that has been accumulated is not easily removed, you may consider using some kitchen-safe household cleaners. Also, try washing the door gasket. The door gasket is what seals the dishwasher door. It is susceptible to moisture and grime so it must be washed. Although it is highly unlikely that it is the cause of the odor from your dishwasher, try scrubbing the dishwasher racks in your sink. You should try everything before calling an appliance repairman to fix your dishwasher.
Another option is to remove the smell using vinegar and baking soda. First, place a cup of distilled white vinegar in the top rack of your dishwasher. The acid in the vinegar is known to be one of the most potent and smell removing agents. And when it dries, the smell of vinegar disappears automatically. Make sure that your dishwasher is empty before attempting to clean your dishwasher this way.
Run a full cycle with the vinegar cup inside. The vinegar will spread throughout your dishwasher this way. And the acid will break down any grime that is in your dishwasher. Then take a cup of baking soda and sprinkle it in the dishwasher. Baking soda is known to be an odor neutralizer, and the combination of vinegar and baking soda is a common solution to cleaning and smell-removal problems. Run a short, hot cycle with the baking soda in it. This will help you to get rid of dishwasher smell.
If all else fails, you may consider troubleshooting or calling an appliance repairman. Many dishwasher manuals are usually available online for free. You may want your appliance repairman to check your drain hose in case of any obstructions within it. If there is any water in the bottom of your dishwasher at the end of a cycle, most likely the drain hose has become either bent or restricted. Therefore, that might be why the flow of water is not proper, and the built-up water gets musty in the hose.
To check the dishwasher hose, pull it away from the wall. If you cannot pull it away from the wall, it may be time for your appliance repairman to step in. Most dishwashers are located near the kitchen sink and have their hoses connected to the same kitchen drain pipe.
Have your appliance repairman to detach the hose and inspect it. The professional appliance repairman may also check whether the dishwasher drain hose is correctly installed at its location. The wastewater from the sink might drain through the hose into the dishwasher if the drain hose is not looped up from the drain pipe before it is run to the dishwasher. So the repairman might raise the loop of the drain hose a bit higher.