New method to clean print heads?

[stratman]

Dye inks do not need shaking unlike pigment inks.
Shaking pigment inks is always a good idea as some pigments always tend to settle a bit. Even Epson recommends shaking their pigment ink cartridges prior to installing.
Generally, inks stored under proper conditions will last two years and more. How much more, is open to debate. It's a similar situation to when should one change the oil in an automobile. Proper conditions include cool and dark. The safe guideline is to acquire ink that one would consume in a year, because if one uses ink less for whatever reason, it can still be good till it's used up. On the other hand acquiring lots then slowing down in using it, will stretch out the period until it is consumed. We don't like wasting things so we tend to try and use it up. The only issue is if it has deteriorated, then we're looking for trouble. Cool and dark and you're good for two years safely.

Thank you for the quick response. Good info to know!