Canker sore: A canker sore, also known as an aphthous ulcer, is a single pale or yellow ulcer with a red outer ring or a cluster of such ulcers in the mouth, usually on the cheeks, tongue, or inside the lip.
The Board will allow a maximum temperature of 120 degrees Fahrenheit. Hand sinks in commercial kitchens are only used by employees. These employees are typically washing and rinsing pots and pans in pot sinks which could have 140 degree water. Those pot sinks, in some kitchens are located right next to the hand sinks.
How To: Hand Washing 101. Step One. Using warm or lukewarm running water lather your hands with soap. Cold water is not as effective and hot water should be avoided because it is drying to the skin. The soap does not need to be antibacterial to be effective.