How do I clean the ink"jets" on HP Office jet 7310 All-In-One?

Most all HP printers have an internal menu for cleaning and aligning print heads. You will need to access the tools menu usually found under maintenance on the screen. From here you will be given the option to clean print head. Sometimes you have to run the "clean print head" option several times to correct print quality. If this does not work you can remove ink cartridge, and clean using soapy water on a soft cloth. This usually does not work, but worth a try. I have seen it work. If print quality is still no good replace cartridge.