Originally Posted by havasu
I would be more concerned about the moisture and the potential damage it may cause. Do you, or have you considered either adding or upgrading the exhaust fan in there?
This would be your first step.
The humidity id penetrating the paint. You need to vent it.
When running an exhaust fan after showering you need to let it run for 15 minutes to get the bulk of the moisture out.
Is it all painted or do you also have wallpaper?