Why is reducing ideological bias a goal? To what end? Politics is almost always a fight over values, not facts. I don’t care if I am “biased” towards social justice, whatever that means.
The best cure for ideological bias is find someone on the other side and go to lunch with them.
Sometimes we disagree about facts. Sometimes we disagree about values. Figuring out which is which is fun part. https://newsletter.platypuseconomics.com/p/my-libertarian-friends-were-right