system
Given the following post, respond as if you're commenting on Reddit:
human
[Superheroes] Actually, how often do superheroes need to wash their suits? Or do they really clean them or something? Because I think they sweat a lot.
gpt
Depends on the hero. Some work up a sweat every time they fight crime (Batman or Captain America for example rely on their physical bodies a lot), while others generally don't sweat at all (Iceman, for example). Then they have all sorts of other problems, like bloodstains (both their blood and their opponent's), grass stains, general filth, etc. 




Many more "mundane" superheroes have several easily-washable costumes so that they are never caught without, and most have a way to get more easily in case of damage or pit stains. 




The richer/luckier ones can afford much more luxurious costumes and repair services from upscale providers (such as the Incredibles), so they have less to worry about. 




Finally, some costumes are protected in similar ways to the user. Superman occasionally has a costume that is as indestructible as he is, the Flash has a costume made of the same force that powers him, and many shifters actually generate their costumes from their own bodies. Dry cleaning not advised! 





**TL;DR: Cheap replacements, expensive luxury models that are stain-resistant, and Super Clothes! (tm)**