Hi i just found your site and was hoping someone could help me with this question. I recently purchased new replacement cartridges for my CX4600 (non-oem) and the cyan and magenta were not working properly, so i did some research and found that i needed to clean my purge tubing.... so i did the cleaning as described, replaced my cartridges and got some success, it got better the more i ran the Nozzle cleaning program, but after about 5 cleanings the software told me my ink was out in all the cartridges,. but upon removing the cartridges to check them i shake them around and they seem almost completely full,. why would this have happened and is there anything i can do to fix this as my printer wont even allow me to print now, it just says im out of ink..... please help i cant afford to buy more cartridges, especially if im not sure this thing will ever even print properly. thanks for reading and im sorry so long!!