Soap dispenser won't lock

Dishwasher Repair
1

the soap dispenser won’t open or close completely and soap builds up inside- what parts do I need repaired replaced??

2

Here are your parts
Replacement parts for General Electric GSD500X-72BA DISHWASHER | AppliancePartsPros.com

Take a look at the parts for the dispenser.
If you click on a parts picture a new page will open, often with a Q&A section about that part. There are several answers on a non closing dispenser.

Also see the f0ollowing info on a round GE dispenser at the bottom of the following page.
http://www.applianceaid.com/dishwasher-soap-dispenser.php#ge-closed