Lick It Clean Until There Is Not A Drop Of Spit Left

What is this idiot thinking?! Mistress Zora does not wear shoes on which spit stains are still recognizable. Not a drop should remain! But no wonder he has done such a poor job. He is such a stupid slave and bores his mistress with his miserable existence. He has to bring at least some small benefit to his mistress, so he must now lick her shoes completely clean. Too bad for him that Mistress Zora spits on them again and again!