Canon i550 Printer

Our Canon i550 printer was having some printing issues. Appears the print head became clogged and would not print black and some of the othercolors were having issues. So after putzing around I figured out how to remove the print head and soaked the ink reservoirs in rubbing alcohol to clean out all the "gunk". Reassembled and ran a couple of sheets though the printer in test and clean mode and presto, just like new?!