Whereas an egg stain on your painted wall is easily removable if the stain is fresh. A dried stain is trickier to remove as it must be scraped from the wall. The scraping process can damage the wall's surface by creating a permanent scratch, but is avoidable by loosening the dried egg prior to removing the stain. A non-abrasive cleaner is the best cleaner for removing egg to prevent paint discolouration and surface scratches, according to "Stain Rescue!" by "Good Housekeeping."
Mix one cup of white vinegar with one cup of warm water and pour the solution into a spray bottle.
Spray the homemade solution directly onto the dried-egg stain until the stain is saturated.
Soak a clean sponge in hot water and wipe the stain with the sponge in a circular motion.
Scrape with a paint scraper to remove the remaining egg from the wall. Scrape gently so you don't remove the paint or damage the wall.
Dry the area by allowing it to air dry.