Black goo/particles at spout openings
I have noticed that black goo collects on both my kitchen and bathroom spouts where the water comes out. On the kitchen faucet, if I take a paper towel and rub over the holes where the water comes out, there will be black goo on the towel. What is this and any way to deal with it? Not real thrilled about drinking the water, washing the dishes,or brushing teeth. Thanks for any info!