Hey @grussem - @HarpinBobbyMcB’s advice is on point - make it a law to rinse out your mouth before you play.
Joe Filisko says it’s good to tap your harp against your palm and wipe it with a cloth every time you finish playing it.
@Slim cleans his regularly as detailed here.
I’m lazy. So when performance starts lagging I rinse underwater as detailed in the thread @HarpinBobbyMcB shared.
I think that pretty much covers it. Pretty low maintenance instruments.