Thanks Al. The tip to look at it under a high intensity light was a good one. I found a small crack in the cover just in front of the notch for the filter position. The label has bubbled up where the water was leaking through. I found one place on line that lists the part but I don't know yet if it is in stock.

Now I am wondering if there is any good way to patch the crack. Perhaps with an epoxy? Will that stick to the plastic? I would like to try something since it will take at least a few days for the part to get here. Thanks.