The first step is to stop politicians from running ads with deceptive info or even outright lies. I'm thinking of the ads that Glenn Youngkin has been running for the Virginia governor's race.
In fact, I'd propose regulations that candidates can only run one ad an hour, max,, followed immediately by an ad from the opposing candidate, and no hired voices. No attack ads.
You can state one policy position, and state how it differs from your opponent. I know, it's a fantasy. But allowing politicians to run the same deceptive ad over and over for hours every week, ending with "candidate X is dangerous" is not helping civic discourse and it simply spreading infectious ideas.