An inkjet printer output is streaked. what would you do?

If your inkjet printer is producing streaked pages, it is time to trouble shoot. If you have your manual, the first thing to do, is check there for advice. If not, chances are the print heads are clogged. Explore to see if your printer features a 'clean print head' feature. Sometimes you need to use it more than once. Finally, sometimes ink is finicky, if all else fails, take the cartridge out move it around, and re-insert it.