When you find you do need to clean the nozzles, you can try several different procedures. The same cleaning cycle you used for the print head can be used for the nozzles. Also, check to see if your model of printer houses the nozzles on the ink cartridges or on the printer. If they're on the cartridge, and the cartridge is mostly empty, you can just replace it. The new nozzles will obviously be unclogged.