The answer to 'how to maintain sanitizing' is to regularly clean and disinfect high-touch surfaces in your home. This includes wiping down countertops, doorknobs, light switches, faucets, and other areas that are frequently touched. Use a disinfectant cleaner approved by the EPA and follow the instructions on the label for proper contact time and application.
It's also important to maintain good hygiene habits, such as washing your hands frequently with soap and water, covering coughs and sneezes, and staying home when you're sick. Proper ventilation and air filtration can also help reduce the spread of germs in your home.