If you're washing flatware in the dishwasher, take care not to spill any undiluted dishwasher detergent directly on the flatware as it may cause dark spots. When loading flatware into the dishwasher, load the stainless steel flatware away from any silver flatware to avoid damage.
A person will most often get a cold sore or fever blister on his lip. People can also get cold sores on their nostrils, chin and fingers. A cold sore lasts from 7 to 10 days.
1 Hydrogen peroxide is an antiseptic that will reduce the amount of bacteria in your mouth and help the canker sore heal. 2  The canker sore should go away in about 2-3 days if you do it twice a day. Unlike cold sores, canker sores or mouth ulcers are not contagious, kissing someone with a canker sore will not harm your partner but may still be uncomfortable for you. 2  Cold sores are different from canker sores â they form on the lips or outside the mouth.