Hi,
Ink cartridges are very complex devices. They are too expensive I know. Using " unbranded " or re-fill types is only asking for trouble IMHO.
The cost of replacement cartridges can be as much, if not more, than the printer price.
Which printer are you using?
What saving are you making by using a " flush " as opposed to buying new?
Does this saving equate to the value of the printer and the number of prints required?
( Printer ink is one of my pet hates! The manufacturers are stealing money from us. Some Epson inks work out at close to �1,000 per gallon - Its ink for ****'s sake! )
Regards
Z