First, check the print speed setting of your printer. If you have it set to draft mode, it’s going to give you a lighter, less defined print. For an easy fix, shift your print settings to a regular print mode. If you have a laser printer and you’ve recently swapped out your toner cartridge, it’s possible that the toner in the cartridge has settled and needs to be distributed evenly. Remove the cartridge and shake it side to side to evenly distribute the toner and try again. Using an inkjet? A clogged printhead may be the culprit. How you clean your printhead will depend on the manufacturer of your cartridge, but in most cases you can usually fix it by running the print cleaning function on your machine. Check your printer’s user guide for specifics!