Windshield washers do not fail easily, but if they do it is usually a clogged nozzle or a faulty water pump. If the windshield fluid is not spraying, then its time to check it out.
If there is no buzzing sound when the windshield washer is activated, then it is usually a fuse that is blown. If the fuse has blown out, then it indicates that there is a problem with the pump which is inexpensive to replace. Replacing the fuse alone may cause the pump to fail again so this is not recommended.
If the pump seems to be working, but there is no water spraying out of the nozzle, then it is usually a clogged nozzle.
To clear a clogged nozzle, use a pin to clear the pathway and then use compressed air to clean off any debris that may be blocking the nozzle.