My canon pixma ip1000 prints,but no ima...

I usually used replacement inks, until I used much cheaper from china. First, black , print a little, then colors, then it prints, but no images/letters, I tried cleaning the print head with isopropyl alcohol , no result , then with lukewarm water, then with chlorox . Still, it is printing but paper is blank. I bought a replacement cartridge made in korea, the same I used before the ink made from china, soaked the printhead for two hours in isopropyl alcohol for two hours , dried for an hour, then put the new cartridges, then perform deep cleaning procedures . Still, no printing , I mean it prints, but no images/letters/colors... blank. Can You suggest another way ? Please help me, Thank You.