Over the last 3 years, I had several faucets and showers start dripping. I made it a point to go through the house and change out the rubber washers in them, which at the time stopped the dripping. I figured this would solve the problem for a few years. This spring (April) I installed a water softener (no water softener previously - had hard water) and it's working great. However several of my faucets have started dripping again. Could this be caused by the conversion from hard water to soft water?