What's my best shot at reusing these canon 270 cartridges?

[juntjoo]

Is it too late for these cartridges or do I need to fill them MORE? I cleaned the contacts on them and in the printhead. Or can you reset these?

Support code 1600. And how do you know it's a "low ink failure? Is this a low ink error?" or might the printhead be a culprit here? Thanks

[juntjoo]

 

 

[juntjoo]

This is an MG5720