Replaced the water inlet valve and cleaned off the rust around the dispenser caused by the leak, then painted with touchup paint. I've done two loads since the repair, and no more leak! As a bonus, I added some screw-on water hammer arrestors made by Sioux Chief, and now the water hammer that would occur every time the valves would close is gone too! Repair wasn't difficult, but cleaning off the rust and repainting with the touch-up bottle made this take much longer as I had to wait for the paint to dry between coats (I decided to put on 3) then waited 24hrs before reassembling everything just to ensure it was fully dry.