Once a month remove the filter at the bottom of the dishwasher that catches any excess food and clean it thoroughly under running water. Remove any leftover food that is stuck to it. You can use a soft brush to clean it. Only use clear water and not washing up liquid as if not rinsed out properly can create extra soap suds in the dishwasher which are difficult to remove.
Make sure the spray arms are not clogged, in most dishwashers you can unscrew these and rinse through with clean water. If they are blocked you can use a toothpick to free the holes, taking care not to break anything off in the holes or drop it inside. A soft brush is also good and you can press the bristles through the holes easily and they won’t break off inside.
Also clean the outside of the dishwasher regularly, wipe round all the edges of the door and inside to remove excess dirt. Also it is a good idea to run it through a dishwashing cycle once every three months when it is empty, you can use a cup of vinegar inside the dishwasher to degrease and remove limescale. Moreover unpleasant odors disappear.
If you are experiencing dirty dishes even after washing and there is a white film on your dishes, it could be that you need to load the dishwasher with salt. Check out the water hardness in your area and top up the dishwasher regularly with salt to compensate for the water hardness.
To find out how you can adjust the softener it is best to look in the dishwasher manual.
In some areas where there is a very high lime content in the water, you can buy special products (Calgon) to additionally assist in cleaning the dishwasher.
If your dishwasher is not working properly, for example it doesn't get warm enough, please check the manual for possible causes and solution.
A hard reset of the dishwasher can be necessary to resolve the problem. This can be done by cutting off the power approximately 5 minutes. If you can't reach the plug, it's also possible to switch off the fuse in the fuse box.