It is so easy to use an appliance and not think to clean it too, when was the last time you cleaned your dishwasher? It is really easy to clean your dishwasher!
Often, the only time we notice it needs a clean is when it stops working. However, if you took the time to clean it regularly this maintenance becomes easier to manage.
How often you clean your dishwasher will depend on your own circumstances, I like to thoroughly clean mine at least once a month!