Here are some tips for you to try before contacting our customer service center. After you have tried all of the following, and your inkjet/toner cartridge still doesn’t work, please contact us via email at customerservice@houseofinks.comand we will help you to exchange the product in question. In addition to contacting our customer service center, please visit our Customer Service page. Some important notes: Please ensure to remove the protective clip and/or the tape over the print head prior to installing the ink cartridge into your printer. After installing the cartridge, run up to three (3) print head cleaning cycles (see your printer manual or help). This keeps the nozzles clean and ensures optimal print quality. To improve print quality, place the ink cartridge print-head on a moistened towel with warm water for 1-2 minutes only and then on a dry paper towel, repeat process 2-3 times until ink begins to flow. Low ink or out of ink error messages, your replacement cartridge is filled to maximum capacity. The ink level indicator window may prompt cartridge as empty or low, please ignore & close the message window. Printer does not recognize cartridge, ignore this message and attempt to print using your replacement cartridge. If the error message persists, clean the contacts inside your printer with a lint-free cloth or towel, use of alcohol is recommended. Reinstall the cartridge and attempt to print.