I am glad to see you have reappraised the situation and come to realise that many things could have caused your syringes to falter earlier rather than later.
Reading through your later interesting threads and explanations as to a probable cause I am inclined to put it down to your eagerness to get your carts clean, and you may have been a little bit heavy handed with excitement to get it right first time.
To properly refill you have to learn a little and fail a lot to gain the experience necessary and not to keep making the same mistakes twice and you’ll master the technique in no time at all, and the best advice I can give you is that patients is not just a virtue but a necessity.
The Halfords de-ionised water is only for everyday house/garage use and not recommended for quenching your thirst with but is ideal for tropical fish however, including Octopus..
I promise you it was not eagerness i have been reading here for a while before i registered reading threads about flushing dating all the way back to when the canon flush clips first came about and your own first iteration of them. (even when Marin first supplied his ones to you for testing) I also watched the excellent video by Martin on his product page...
http://www.octoink.co.uk/products/Cartridge-Flush-Clip-Set-[Canon].html
Well before i made my order.
The actual refilling process with ink i have not even attempted yet. My set of inks still have the seals on their bottles. If it is one thing i do not do it is rush things. I am still not fully decided to go the German or top fill method. I was not decided on that when i ordered either, which is one of the many reasons i went for 2 sets of carts see i can try both methods. I am definitely not the type of person that goes charging in to things and not thinking first.
I was also not steadfast it is the water i have not been since the start i was simply relaying a potential issue (sorry if that still is not clear). It was a potential issue kindly mentioned by Martin along with a link he provided in his email to back up that it COULD BE a POTENTIAL issue. I reported the water for others to be aware of it nothing more.
Looking at Martins flushing video again at the above link, i see something else which may be another potential problem. The design of the plunger on the syringes since his filming of that flushing video may have changed. (AGAIN i make this clear, this is GUESS work nothing more, i am in no way saying this is the issue for DEFINITE, i may be entirely wrong, it may be an optical trick water can magnify things and video angles can make things look different etc)
If you look at his video and compare the syringe in it to mine here...
First sorry for the blurry picture (curse my phone and shaky hands)
Anyways...
1) The rubber plunger part looks thinner (mine being 4ml in thickness/height or there abouts) where the one in Martins video looks to be around double that
2) There clearly is a wider gap between the 2 rubber washer like parts (IE the 2 bits of rubber that slide against the insides of the syringe barrel) on the syringe in the video and mine.
3) Not easy to tell but mine has 2 plastic disc like pieces above the rubber plunger not sure the one in the video does.
Im actually not happy with that picture, (i wanted to also try to get close enough to show the wear on the rubber plunger) i may try to take a better one if needed but for some reason my phone does not want to focus properly at the moment. Hopefully its clear enough to make sense of the points though.
Oh and the water, earlier on you did say you could drink it, im glad i did not taste it now, bad The Hat trying to poison me


hehe
EDIT:
PS
@The Hat regarding the PM just to voice this publicly i appreciate all your advice and time, i most definitely have no issues with you, any user or any replies i have had. You have all been a great bunch helping with suggestions.
I also hope the drinking water jibe thing and you poisoning me is taken in the banter way it is meant.