maytag dishwasher

We have this dishwasher and it works well with the exception of the fact that it is always spitting sediment up in the dishes. We do have hard water and I suspect that to be part of the problem, but I am also wondering if there is someplace down in the bottom where I need to clean out or something like that. The drain doesn’t appear to be clogged but I am not familiar with how to clean it out or if you can clean it. Any help would be greatly appreciated.
Thanks
Eric