Yellow color does not print

I was told that with this problem the more cleaning you do the more ink gets smeared on the printheads. The more ink is going to dry up and clog the pathway. That I should " simply" clean the cartridge/print head assembly! "Simply!" But, no suggestions on how this is "simply" done.

Sometimes the people who write the guides don't understand whats involved ;-}

Clearly this is a 'Simple' problem Ha!

All the kidding aside... I use a Cotton Swab (Q-Tip) and give it a pass or two following the direction of the jets for the given color. After I do this I run a test print to see if the ink is working. Some printers offer a print head cleaning routine.

Answers here totally miss the point. My Brother MFC-J4510DW prints green instead of yellow, including in the grid on the TEST PRINT page. The array of dots - black, yellow, cyan, magenta is black, green, cyan, magenta. It has nothing to do with cartridges in the wrong slots or print head cleaning.

@Keith Davis - Sometimes you need to read the full answer which includes the comments. I made it very clear it was either the ink level or the print head was clogged.

Did you check your ink tank to see if it has ink? That was the very direction outlined.

Where did you get to the idea the cartridge was in the wrong slot? Most printers have a keyway to prevent that (unless you break the key).

Dan, the yellow cart is new. I'm getting green in the test page dots, should be yellow. Wouldn't be green anyway without the yellow to go with the cyan!