ST. LOUIS—Despite three thorough cleanings this month, the change machine at Naughty But Nice Adult Magazines & Video Gallery has once again become clogged and inoperable. "I don't know what's wrong with the damn thing," said store owner James Vanderbek. "We paid too much for it to have to be cleaning it every week, I can tell you that." Said Ken Woodruff, the store's assistant manager: "It always seems to happen on Wednesday nights: Right around the time this one funny-looking tall guy leaves, someone always seems to complain about not being able to get change."