The blue cartridge does not appear to be working. I cannot get blue or green to print. I tried the HP controls and cleaned the print head but without success. I bought new cartridges but it still will not print blue or green. The cleaning uses quite a bit of ink so I do not want to have buy more ink just because of cleaning to deal with this issue. Can anyone offer guidance how to get my blue working again? I am hoping I do not have to take anything apart! Looking forward to some help. Thank you.