When do I REALLY need to change toner cartridges?

I replaced my original black cartridge already, but I have never replaced the color cartridges. Black is currently indicating "low" and the color is indicating "very low", yet I am still getting excellent quality prints. However, just today, the printer started to cycle through "Cleaning" after each 1 page job. Is it time to replace?
Thanks--

@rain007
That is great news! You stated that these were the original color cartridges...if these are the original starter color cartridges that shipped with this printer than the predicted page count is around 600 pages not the 1300 I started earlier. The 1300 pages count yield is for color cartridges that you would buy to replace the started cartridges that ship with the original printer.
Let me explain...this printer ships with what we call "starter cartridges", cartridges meant to get you started printing and usually have to lower page count. You replace these with a higher page count cartridge (the ones I started in the early message) soon after setting up the printer or within the first year, depending on how much you print.
Because you are at 3005 pages on the color cartridges, I would replace the color cartridges if these are in fact the orginal starter cartridges. While you might not be seeing the issue or a degardation in your print jobs today, it will probably presist in the future because you are still using the starter cartridges. But again this is going to be your preference.
Does this make sense?
Looking forward to hearing what you find out about your firmware. Please let me know if you have any questions about this above information.
I am an HP employee.
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When do I REALLY need to change toner cartridges?

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