Chosen Solution

starting several months ago we find about a half cup of water left in the soap dispenser after running a wash. This wasn’t a problem before I have cleaned the tray, find it appears to operate normally, the valves move freely. I have stuck a pin into the 3 tube holes behind it and found nothing clogging it. We have to manually empty the cup before each load

This can be caused by low water pressure. The water inlet hoses have screens that can get clogged. Here’s how to clean them: https://www.familyhandyman.com/appliance