I use a mix of 80% distilled water and 10% ethylenglycol plus 10% of propilenglycol at the end of the day , just unmount the printhead and make a waterfall flush ( be carefull with the cables) , also using the same solution in capping station.
You flush the printhead everyday? what printer are you using?
R3000 , do what Andy says , I just broken the air pressure system applying to much pressure from the syringe.
I'm still waiting the ink bags to bypass it . It's so delicate .