This infurated me for ages.
  My last printer used to allow me to flush / recover individual colors on the colour cartridge however, after it died we moved to a Lexmark all-in-one printer,scanner. 
 If one colour goes off from lack of use - you have to keep printing (and wasting) ALL of the colours, just to get the one thats stopped working again. 
 So, I had a brainstorm last night when the Blue stopped working - simply draw and fill a square in deep blue (I used MS Powerpoint) - or whatever colour ISNT working. 
 I filled half a sheet of A4 with the box - and then printed it out a few times on 'better' quality - RESULT!!!! 
 Within two prints the blue was working properly again. 
 Cheers - Frank 
 Wish I had shares in the cartridge companies 
