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Many thanks for the clear instructions. I have tried my best to manipulate the sponge as described but, apart from creating a pocket of space around the air vent, I'm not sure that I've managed to achieve much (apart from a bent needle). I guess the idea is to create an air channel along the ink...

Thanks for replying. The first nozzle check was done this afternoon with a refillable (please forgive the black splodges - scrap paper). The second was done just now with an unused Canon starter OEM cartridge which I just unsealed for this test. As you can see, the magenta has now stopped...

I would be grateful for some guidance. My magenta nozzle check is showing starvation (some ink, with U-shaped gap) which persists no matter which cartridges (551) I insert. I have tried 2 sets of refillables and an OEM. The background to this is that I was having magenta nozzle check problems...

Sorry, my mistake. It was possible last time I did this, probably a couple of years ago, but now I see all buyers are anonymised by ebay, and there doesn't seem to be a way to contact them. Mores the pity.

One thing I've found useful is to go through the sellers feedback and contact a few previous buyers who bought the same product you're interested in. They almost always provide helpful replies.

Just a quick update. I soaked my printhead again in a fairy solution. This time I did several changes of fluid and also agitated the head every so often. My method was to lift the head and let the fluid drain through it, and keep repeating. Lifting it fast as fast as possible allowed plenty of...

Is it normal speed when photocopying? How about if you print via USB? If both are OK then try changing the wifi channel on your router. It's possible that a neighbour's wifi is interfering with yours, slowing it down. A scanning app on your phone would help. Finally, check for anything slowing...

Thanks both. More soaking it is then...

I soaked the printhead in deionised water with Fairy liquid for a couple of days and the nozzle check is significantly improved! The second cyan strip is now almost perfect. It takes careful scrutiny with the naked eye to spot a couple of faint white streaks, whereas with previous test they were...

@palombian: I've uploaded a 1200dpi scan of just the cyan strips (zipped so it can be downloaded and viewed properly at dot level). Because the plain paper was rough and confusing at this resolution I have printed this test on (my least favourite!) glossy paper. I have also, I think, eliminated...

@The Hat - Thanks very much for your advice. Can you advise the ratio of Fairy (or W5) to water? Since it will take me at least a couple of days to get either Fairy or W5, would it be safe/worthwhile to start now by soaking the head in Pharmacist's conditioning solution? (I have IPA, deionised...

Thanks for replying. It's a bit difficult to see in real life. The jpeg was scanned at 600dpi, but I think might have been downsampled after uploading. I'm uploading a tight crop of the first two cyan strips, which I hope will be easier to see. I bought my ink and carts here...

Hi I've had an MG7550 for about a month and am using OCP ink and refillable cartridges - I'm generally very happy with the photo output. The carts have ARC chips that reset at 20%, but (probably because I only filled the sponge section, as per the supplied instructions) the ink started running...

I've been successfully refilling my Officejet 6500a (using OEM 920XL cartridges refilled with OCP ink) for quite some time. But a few days ago it dumped a streak of cyan onto the page followed by complete cyan starvation. There was still plenty of ink left (measured by weight) but I swapped over...

Just a quick note to share my experiences with getting the colour approximately 'right' on my Officejet 6500 all-in-one wireless printer. Unfortunately, as far as I'm aware (please correct me if I'm wrong) there is no way of overriding colour management in the printer driver, so no point in...

I have a similar problem with my HP 920XL cartridges. For tank-style cartridges the solution is here: http://www.nifty-stuff.com/forum/viewtopic.php?pid=62664#p62664 Essentially, weigh a completely empty (flushes and dried) cartridge on a digital scales and make note of the weight. When you...

Thanks for your reply. The replacement black ink is also pigment based. It think the reason for the clogging is that after my initial (and, with hindsight, unnecessary) attempt at head cleaning I left the head to dry out completely for a couple of days before putting it back into the printer...

Print-quality report here: Is it possible to tell from this whether the print head is either blocked or damaged?

Hi I'm have print quality problems with my HP Officejet 6500A Plus. I tried refilling the original (intro) cartridges by injecting OCP ink via the vent hole, but was getting flow problems. After trying various things I removed the print head and soaked it in hot water in case there was a...