Hi there, Potty,
I believe your cartridge is a fairly standard type showing the print head at one corner and brass electrical contacts on one side?
If so, these can very often be revived when dried out by standing them with the print head in a saucer of hot (NOT BOILING) water until it cools.
When cool, wipe print head with paper tissue to check for ink and repeat if still dry.
Another thing to check is that the electrical contacts are clean. They can often get covered with grease from the fingers.
Clean with a small brush and methylated spirits. Allow to dry properly before replacing cartridge. You can also clean the contacts in the printer but switch it off first.
Another point of interest? Running the in-built cleaning process uses a hell of a lot of ink, particularly with a colour cartridge.
Instead of using the cleaning process, first run a short Document page which includes a line of each colour. Yellow, magenta, Cyan and Black.
If any particular line of colour is either feint or shows white lines through it, then make a document page of only that particular colour and run it until it clears and prints properly.
Hope this helps.