Why does hp keep moving the holes in the ink cartridge? -

Does someone at their corporate office sit there and find ways to stop us from refilling them? Or is there a reason behind it?

HP is always playing with the venting system to decrease their failure rate. Currently out of the box about 0.25% of all HP cartridge just won t work. Hp is working to decrease this and the main area outside of ink tech is the venting system. All you you need to do is peel the label off.