Dodge Demon Headlight switch removal

To remove the one screw attaching the fuse box and move that box a tad makes it much easier to find and push the stem release button. And don't push the button to reinstall the stem. That can wreck the latch. The stems tapered point will guide it past the latch.
Contact cleaner? That depends on what fault. This switch has thermal protection built in. If the headlights suddenly go off then go on again, replace the switch.