Mouseferatu
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Does cleaning your face include a shave?
Only if you make a successful shaving throw.
Does cleaning your face include a shave?
Only if you make a successful shaving throw.
Only if you make a successful shaving throw.
Welcome, @spaceseeker19! I would disagree with your assessment.The spirit of prestidigitation is that it is a temporary, impressive magical trick. So I would rule that the transmutation lasts only so long as the spell does. When the spell expires, the transmuted object reverts to the state it was before the casting. So you can use prestidigitation to instantly clean yourself and your party for an audience with the King, but after that audience (an hour later), the original grubbiness of the party will return, and they need to actually bathe and launder their clothes in order to become clean in any lasting way.
Does that mean that the PCs remain clean during that hour? No, the cleaning is instantaneous and it is not an illusion, but a temporary transformation (ie, transmutation): they can still get dirty again...and the caster can instantaneously clean that, too, as long as it is during the hour of the spell's duration. But the dirt that was cleaned will return after the spell expires.