Fixing dishwasher (drain, cleaning, kitchen, vinegar)

[tar21]

My dishwasher is not cleaning well and leaving soap residue it is a kitchenaid type 586-1 model kude48fxwho, I removed and cleaned the bottom sprayer arm but can't figure out how to remove the center spray arm, here is a picture https://imgur.com/a/ksCSN How do I remove it? There are no visible bolts.

[K'ledgeBldr]

You probably should concentrate on the strainer-

[ShaneSA]

First remove the bottom strainer and clean the screen and drain. Then pour a large bottle of white vinegar in it and run a cycle. that will clean out any soap scum in the drain lines. You may need to do it more than once to get it back up to speed.

[JonahWicky]

It probably snaps together. Find the tabs that need to be released. This will probably be much easier if you remove the whole sprayer assembly.