I've got my top end all disassembled and in the process of inspection and assessment. I will be shipping the jug and head off for some work and of course want to clean it up as well as possible before sending it off. Despite my usually meticulous post-ride, pre-work cleaning procedure it appears I missed quite a bit of crud wedged way down between the cooling fins, especially around the spark plug. Since this is my first top end work on an air cooled motor, does anyone have any advanced and/or simple and effective method for getting 'er squeaky clean between the fins?