Dishwasher is not cleaning very good. How do I check it myself.

check the food trap, do you use a special rinse?

You might try removing the sprayers and see if they're gunked up. Or if you have removable parts at the bottom, take those out and clean them by hand. Run an empty washer with a big cup of vinegar in the top rack.

Call the company and ask their hot line technician standing by what to do, Have ready the phone number, make and model, and the symptoms the d/w is having. The information you need is usually on the frame of the unit.

Check online for user manual if you dont have it. There will be a trouble shooting page to help you. Check youtube also I found a video showing how to disassemble to correct a problem for my dishwasher. Good luck

Run a cup of vinegar through the dishwasher with hot water. Also check to see if the drain screen is clogged.

CHeck and see how much food particles have built up under the sprayer. Remove the gunk.