How do you fix windshield wipers on a 1998 Lexus ES300 that do not tuck below the hood?

If there is no other mechanical problem the wipers tuck under the hood by pushing the wipers under the hood. Sorry if you already know this, but they have two settings one for winter (which I'm assuming you are talking about) and one for nonwinter time (under the hood position). It will actually snap down into position under the hood.