I have a Canon BJC-4300 printer which has stood idle for some time. It will not now print, I tried doing the clean test and eventually asked my computer know how neighbour for any help he could give. I said I needed to clean the print head as it had become clogged up with dry ink, dust etc. But he didn't offer any help as to how to do this. Do I need to take it to a specialist, can I do it myself or do I chuck the lot in the bin? thanks