Firstly, one has to eliminate the ink cartridge from the carriage and seal the oral cavity from where the ink releases. Seal the cartridge to prevent them from drying. For this, you just have to place the cello tape so that the ink will not run out.
Raise the means that hold the print head and ink cartridge in place and remove the entire print head from the printer. Pour hot water on the unclog print head until it gets clear. It will take few minutes. Place the print head in the hot water and soak it for half an hour. Then, concentrate on clogged pattern.
Try to put the water at the opening of the unclog print head so that ink flows into it. One can do it by holding the valve and using water pressure on it, if you do not have any other way now. You can also use a plastic syringe, which you get along with the cartridge refill kit.
If you notice more colors are coming out, it means you are doing well in removing the ink from the unclog print head. Keep this up until you get no ink through it. After this, let it drain for few minutes and dry it off.