print head might clog up

It is a common problem with ink jet printers. Try to clean the print head 10-20 times. (It will used up some ink.)

Manufacturers always advise users to print every two weeks or once a month. If the machine is still under warranty, you can send it back for repairing. If it is out of warranty, dip the head in hot water(60 deg C)for a while or clean it with alcohol.(Assume you know how to take out the print head from the printer. Some of the models only technician can dis-asseble it.)

good luck