we had a priport that was stored for a few years. i havent worked on these regularly for almost 10 years, and even then it wasnt that often. we arent getting full ink coverage on the copies. ran over 1000 copies and it got better (initially about 10% of the image to now about 70%) but theres still some areas that wont fill in. im thinking i need to remove and clean the drum screens because im sure theyre probably clogged after sitting for years in storage. whats the best thing to use to clean the screens with? alcohol? something else? thanks