Wiping a switch with a red cotton swab may refer to a method of cleaning or maintaining an electronic device by wiping the switch with a red cotton swab, possibly to remove dirt, dust, or grease to keep the device functional and reliable. Cotton swabs, also known as wiping sticks. Cotton swabs are small wooden or plastic sticks slightly larger than matchsticks, wrapped in a small amount of sterilized cotton, and are primarily used in medicine. Clean swabs are the choice when it comes to precise clean wiping applications to eliminate contaminants and maintain cleanliness in the specialized environments of manufacturing processes. After wiping, they have low levels of chemical residue, are flammable, easy to dispose of, and environmentally friendly. Most cleaning swabs are conductive grade to keep operators and tools grounded. Suitable for class 10 cleanrooms, packaging varies.