How do you fix wipers on a 2004 Lexus es330 that won't tuck under hood?

There are two positions for the wipers on an ES330, winter and summer position. The summer position is down under the hood, and the winter position is where I imagine they are now. To switch between the two, just requires a push down to summer position, or a tug up to winter position. The idea between the two positions is that in winter, with snow on the car, the wipers won't get stuck underneath the hood, but during the summer, when that isn't a concern, they can be tucked out of the way for a cleaner look.