Just purchased my SP-300v at a ridiculously good deal. The previous owner was a huge manufacturing company that bought it only used it a couple of times but the catch is it’s been sitting for an unknown amount of time. The company went under and they just wanted everything out. So I got a good deal. I’m hoping the machine still works good I mean it was only used to print a couple things. I noticed there is a bit of dried ink in the tubes and am curious if there is a way to manually clean the tubes I or do I need to use four cleaning cartridges?