CLEAN YOUR PRINTER HEADS IF NO INK PRINTS OUT!
932705
I just recently wrote a bad review. I want to say that I TAKE that back. After purchasing another ink set, they did not work either. Googled my printer, YouTube said to CLEAN THE PRINT HEAD! I did and Sophia Global Compatible Ink Cartridges worked just FINE.
I APOLIGIZE and THANK YOU AS WELL. Sorry for the confusion!

I YOUTUBED-- How to Unblock and Clean Printer Heads Canon MX870 Pixima
57659
The product was old and clogged the print head. After cleaning the printer with a product from a producer of compatible ink cartridges and installing a new set of those aftermarket cartridges, the printer is working flawlessly. Also, the aftermarket products are a quarter the price.
1566927
These worked great for cleaning my thermal printer's head.  Scrubbed on the print head for a while with one of these, then wiped with a lint free tissue and repeated until the tissue didn't come up with crap on it.
1251585
The ink if fine but because I don't use the printer often enough, the heads need to be cleaned each time. I've switched to a laser printer for most printing so haven't used my inkjet for some time.
2569087
I love not having to constantly change cartridges, but the system frequently has to be reset and the printer heads cleaned.  It's a minor inconvenience, but one that keeps me from giving it 5 stars.
3367381
Printer frequently needs head cleaning.  Don't know if this is caused by Epson ink or the printer.  Colors are pretty low quality.  Both of these issues could be related to the ink which is the Epson brand.
3657030
I filled this ink to a PGI-225 ink tank with the pigment black ink in the set. Shortly after a couple of uses, the printer no longer prints black!!! Not matter how many times I applied the printer head cleaning routines. The black prints never come back and the clogged black never got cleared. Eventually, I disassembled the print head and found that the black print head was clogged by some dark pasty materials. There is no way that I could get the print head to work anymore. The color one are dye ink, so they are OK, but you definitely want to avoid the pigment black. The printer which I only used one set of original ink tank is now is now useless.
3041939
Your ink cartridges have leaked ink all over the place...my hands...my desk...and some of my documents as well as a bible. The inside of my printer is now flooded with ink!  I'm VERY unhappy. I'll never get this clean. I will have to buy a new printer!  I think YOU people should make this right!!!!!  I wish I could give these things NEGATIVE stars!!
1950402
My Epson Stylus NX430 stopped printing altogether.  The printer doesn't see a whole lot of use - print a few coupons over the summer and kids' school stuff during the school year.  Tried printing something and got a blank sheet.  Tried a head cleaning but got a message that Magenta was too low to do a cleaning...  I only needed to print B&W so I was irritated, but ordered a new set of ink.  Put in the new Magenta, head cleaned multiple times, but no luck.  Next, I began following the steps found here:
[...]
Step #1 in that link got one of the colors working a little bit, so I went on to Step #2 and ordered this cleaner from Printhead Hospital.

The cleaner arrived, and I followed the instructions to the tee.  The first step in the instructions had me leaving fluid in for 5 to 60 min.  This cleared up Cyan and Magenta quite a bit, but still now black or yellow.  I followed troubleshooting steps and warmed the solution longer and left it in the print heads for longer, and also used a pumping action with the syringe.  The printer went from 0% printing to at least 90%!  There were still a few streaks in some prints, and a few lines missing in the nozzle check.  I emailed Printhead Hospital support and they replied quickly, stating that a few days of normal use and one or two more print head cleaning cycles (using the printer, not the solution) should clear it up completely, and it has.

Bottom line - this $18 purchase saved me from wasting $50 on new printer ink and $100 for a new printer.
2808728
I bought this for my parents who only print maybe once or twice a week.  What we found was that it works great when you have new ink cartridges and are printing often, but if you let it sit for more than a few days, then the print heads dry up and you start getting streaks.  But the most frustrating thing is that when you then go to do a print head cleaning, it takes 3-4 cleanings to get it right and each cleaning uses about 1/6 of your print cartridge, so by the time you get it working, you're out of ink again.  Until Epson fixes these issues, both with the print heads drying out too easily and with the print head cleaning consuming WAY too much ink, I cannot recommend that you purchase this product unless you are printing every day.
317931
I bought this just over a year ago in 2003, and today, my printer heads clogged up permanetly.  I cleaned them about 10 times, but that didn't solve the problem.  What happened was my black and cyan cartridges were almost empty so I went to AAFES and bought a new black ($29.95) and cyan ($9.95) cartridge.  I come home to replace them and installed them.  I printed and all that printed was magenta and yellow!!  The monitor showed the black and cyan were full!!  So now, I go to test with old cartridges to see if I was sold an old cartridge, but my magenta just ran out b/c of all the cleaning.  I looked on Epson's site and the owners troubleshoot manual and FOUND NOTHING that solved the problem.  I also read other people's printer heads are worn out.  I bought this printer for $149.00 from AAFES (Army & Air Force Exchange Service).  It did produce great prints, but I bet yours will last about a year or two.  Have fun fixing it!!
3996621
This printer prints very well.

Thats the good news.

Bad news is the ink cartridges,

which are very expensive, seem to

dry out on their own as well as report

back falsely that they are empty.

I am looking at two cartidges here which you

can see ink inside but are reporting

that they are empty. If they are empty the

printer will not work even if you are

printing black.

This problem is so serious and reoccurs

through the entire Epson line of printers

that I can not recommend Epson nor will

I buy Epson again.

Yes its that bad!
1020906
DO NOT PURCHASE!! After installing these ink cartridges, my Canon MG-5220 printer stopped working. Every print I attempted came out as a blank sheet of paper. I ran several print head super cleans as suggested by Canon to fix the problem with no success. I then replaced 2 of the new cartridges with 2 more (the ink ran out of them during the print head super cleans), and then the printer started working properly, TEMPORARILY!!!. Oh, and for the record, if you do have an issue with your order, don't bother contacting Customer Service as they performed as poorly as the ink cartridges do. You will just have to write off your purchase as a loss.
2754504
After purchasing 6 of these and then having customers start to complain about not seeing anything on the paper,  I figured out that the fix is to run 2 to 3 cleaning cycles (under maintenance in the preferences) it comes back to printing perfect again.  If you are not printing very often the nozzles dry back out again.  The new cartridge doesn't make a difference until you run the cleaning cycle....
1076246
My second Brother printer. First one didn't copy and scan. I regret not buying this one sooner. Great product! And if you haven't done so Google how to reset your toner cartridges. You will get months of more printing out of them! Do not change your cartridges when it says! Reset them and keep printing. Easy to reset. I just write down which one I reset and when the color starts to deteriorate I know which one to change. I'm not joking you will spend half in toner if not more. Mine is used in a work environment and we literally get three more months out of a cartridge after resetting until it's really empty. Such a scam
3224926
Forget the cheap inks.  They could clog your printer head and you just don't know the quality control parameters.  I had an Epson Printer that I was constantly running the head-cleaning process on.  Finally it was hopelessly clogged. I had been buying the four dollar cartridges that I had been told were "just as good as OEM".  I have been using genuine Canon ink on my i9900 for 2 years and have not had to clean the heads once!  I've checked around, and Amazon has the best price on the 8-pack of anyone.
1657169
I posted a printer problem fix on fixyourownprinter.com and am reprinting it below. I have owned a Multipass 3000 and now have the mp390. I have used the printer for several years and when it is printing it works just great. But there seems to be a chronic problem with the print head (black) clogging up. Here is my post. Try this in lieu of purchasing a new print head.

I have an MP390 Canon Multipass printer. I have fixed my print problems so many times I thought I'd post here even though I don't see anymore references to my printer (now very old).

I have problems about every six months with the black not printing. This is because the print head is clogged with dried ink (probably due to buying cheap ink).

I fix this by removing the print head and removing the black cartridge. I then go to the sink and run very hot water directly into the cavity for the black cartridge. This softens up the dried ink. Then i reinsert the black cartridge, and holding it over the sink, blow as hard as I can into the little vent hole on top of the cartridge. If you can manage to have a flood of ink come out of the bottom, then you are fixed.

I believe this would work on any ink cartridge that has the vent hole on top of the cartridge, and particularly where either the printer has not been used often, or if cheap ink is used that causes the ink to dry up or become congealed in the print head.

A couple of years ago I discovered my solution on-line. At that time the MP390 Multipass was fairly new but multiple people had the same problem. All of the stuff about using distilled water, alcohol, compressed air and so forth is unnecessary. I have fixed my print head about 4 times with nothing but hot water, with no resulting damage to either the print head or the printer.

Remember you have to put the ink cartridge back in to create a proper seal, and blow through the vent hole. Attempts to force air directly through the print head ink opening will probably not work because the larger opening will not be sealed.

Finally this solution may not pertain to you as I am not familiar with the MP730. But it may help someone else.

Regards, cage67