sticky water residue

For the past couple of days, the water coming from the tap is sticky and somewhat slick at the same time. This has never happened before. I tested the water coming through my countertop water filter and it also has this quality. I am going to call the water company on Monday and will ask about...

Ever since I had a simple Pressure Reducing Valve ("PRV") replaced @ 18 months ago on our (closed) home plumbing system, our tap water leaves a sticky/tacky/drying residue on our skin, hair, and laundry (from both the hot and cold water), and even in our GE fridge filtered water. Similar...