|Muggles' Guide to Harry Potter - Magic|
|First Appearance||Harry Potter and the Half-Blood Prince|
One of a number of cleaning charms, Tergeo seems to siphon fluids or dust off a surface.
In Harry Potter and the Half-Blood Prince, Hermione uses this spell to remove blood from Harry's robes; later, she uses it to clean spilled ink off Ron's Dementor essay.
In Harry Potter and the Deathly Hallows, Ron uses this to clean grease off a rag which he then gives to Hermione to wipe her eyes with, and later Harry uses this spell to clean dust off pictures that he finds in Bathilda Bagshot's house.