Lady called told me this story - Using same aftermarket toners they've used for years, her helper installed a new toner, lady doesn't know which color her helper replaced, made some prints and color was off/wonky. So helper swapped out all of the remaining 3 toners and still problem persisted. So the lady who called then replaced all of the 4 toners again with new ones using after market and same problem. Colors are off and and when printing black images where the black fades to grey in a picture it has a green tint to it. She then sprayed some canned air inside printer to remove the toner dust and did a printer calibration. Any suggestions what I might try for them if I go over to help them? I'm retired but still putz around just for something to do. Thanks much if you take the time to give help.