Do you have hard water?

A product made for dishwashers called affresh can help with odor and mineral deposits.

“Designed to penetrate, dissolve & remove odor causing residue. Power away lime and mineral build-up that can occur inside your dishwasher. Cleans dishwashers better than bleach.”

Check out product description product reviews some Q&A here To see if it will met your need. It can be found at some grocery stores -hardware stores and of course online

They sell a product called Plink at Bed Bath and Beyond for $3.99

Clean washing machines and dishwasher. You could also throw cream of tarter in it. I've never tried this but am told it works.

You can also buy a product named Limey Shine. It is great for hard water. Or occasionally I place a cop of white vinegar upright in my dishwasher and run it through a cycle. That will also clean it very well and is also a very cheap and eco friendly solution.

We have serious lime build-up (calcium salts from the water) here. Vinegar takes it off. sometimes it needs a bit of scrubbing, but often using a spray bottle to soak a paper towel and then leaving the paper towel in place an hour or so will loosen most lime. I run a "wash cycle" with vinegar in a cup in the top rack periodically to get it from getting too bad between cleanings. To clean mine, you have to take out the bottom rack to get at the filter basket. Lift of the washer arm and lift out the basket. Give it a good scrub before reassembling the whole works.