My prints are too light, too spotty, or have horizontal lines.
Solution:
You may have a clogged print head, a problem that can occur if you use an inkjet printer infrequently. Your printer's utility program can clean out the dried ink, and print a test page for inspection. The step-by-step instructions on how to do this vary by printer. From the Windows 7 Start menu, click Devices and Printers or Control Panel, and look for your printer's utility app. For additional details, read "Solve Inkjet Printer Problems." For more tips on unclogging ink nozzles, go here. (Again, these steps may vary slightly for Vista and XP users.)