CX6600 prints black lines through out documents

In this case what i would request u to do is....... Take out both the catridges from the Printer......... Take 2 Paper Towels one should be wet with Luke warm water and the other one should be dry........... Take the Colour catridge first turn it upside down and u will see a small copper plate on the catridge from where the ink comes out....... Place the wet paper towel using ur thumb on the Copper plate and press it a lit bit for 10 Seconds...... Now remove it and see whether u see any ink on the paper towel.......... U should see some ink on it now place the dry paper towel on the ink catridge in the same way........ Now do the same procedure again.......... Do the same procedure twice on the Black Catridge................. Now take the dry paper towel and turn the direction of the cartridge so that u can see a Copper plate on it with small boxes just clean that copper plate with the Dry Paper Towel.......... Now try to Print it should work fine.......... Still same Problem Catridges Defective......... Good Luck...........