We bought a used dishwasher and have finally hooked it all up. There's a lot of hard water deposits built up inside the dishwasher. A lot of crud by the drain. The spray arms don't spin but it seems like it should be enough water going through them. I think it probably just needs a good cleaning. How do you clean the inside of the dishwasher? Are there any recommended products for the job? How do you clean the spray arms. I sure hope we can get it working because it's been a job to get it installed.

Thank you.