The antonyms for the word "steams up" indicate the opposite direction of heating up or creating fog on a surface. The phrase "clears up" means for the fog or mist to disappear, leaving the surface or surrounding clear. For instance, if a bathroom mirror fogs up, it takes time to clear up, making it visible. The phrase "dries up" means to dry something that was wet or moist, such as condensation drying up on the window panes, making it clear to see. Another antonym for "steams up" is "cools down," meaning that the surface or area is getting cooler or no longer heated up, creating steam.