Door handles are one of the most common places where harmful germs and bacteria live. That's why one of the surest ways to prevent household illness is to disinfect door handles and knobs. As you go about your day at home, take a few minutes to wipe the doorknobs clean with a disinfectant wipe.
It can take hours for brass handles to effectively sanitize and the brass coating decays and wears off as the years pass by.
If someone is sick or you're in the midst of cold and flu season bumping this up to once a day can't hurt!