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The water dispenser on my refrigerator sticks when you press it in. Sometimes it pops right out, and sometimes it stays in for 10-15 seconds. I've taken it apart a couple of times, cleaned it out, and tried spraying lithium grease and Liquid Wrench "Dry Lubricant" in there. Both work for a few weeks, then it starts sticking again, and gets worse over time.
The switch is a little plastic wedge that slides inside a plastic opening. Any tips?
If it's entirely a mechanical valve, then use food-safe silicone grease. If it still sticks, you can just replace it.
If it's an electrical switch that opens a solenoid on a water valve, then you should just replace the switch.
I've had really good luck getting replacement parts and advice from http://www.repairclinic.com
You could try silicone grease. It's usually used to lubricate O-rings. It's food safe. You can buy a small container at the home store for a few dollars.
