Hello from JA My name is Woody. I will be glad to assist you today. I have been servicing ALL Major Brands of Appliances for 33 Years, and have over 100,000 in home repairs and over 50,000 phone and internet repairs under my belt.
Can I please have the Full model number of the unit to better assist you ? Have you used a commercial dishwasher cleaner on the unit yet?
It is GSD1807K00BB.
I've run vinegar through the machine, it helped a bit...
I can not pull up any info on that model number but I also see it is a Canadian model or I see you are from Canada I should say.
OK if the vinegar helped use a cleaner this will clean all the interior parts ,or the spray arms, tank ,pump assembly.
I recommend Finnish dishwasher cleaner ,in the states we can get it anywhere dish washing detergent is sold.
and scrap the food off the dishes but do not rinse then and run the hot water at the sink ,before you run the dishwasher , to dissolve the detergent ,
Excess detergent will also make the dishwasher not clean properly also