Fixing Dishwasher From Leaking
For the backstory, read this post first. Because many people had experience the same leaking issue from their dishwasher, which includes the Whirpool brand, there are a handful of YouTube video showing how to fix it. I followed this one.
Replacing the dishwasher diverter valve seal grommet was straightforward. I just needed to wait for the product to arrive from Amazon. The first time I replaced it, the water still leaked in tiny drops. My wife read somewhere that applying sealing tape around the grommet would stop the leak. I did that and voila: no more leak.
The grommet cost $5.