I noticed a small amount of mold (or mildew) on the dry wall under my kitchen sink. I don't know how long it's been there, or how long it's taken it to get there, but I cleaned it up with some disinfecting clorox wipes. Is it possible some tiny amount of water go through the part where my faucet meets the counter top? If so, is there anything I can put there to stop it? See photo.