I have an executive pro. They are a pain in the butt to clean. Just buy some really good glass cleaner or lens cleaner and take the "whole" qtip swab off. make sure your fingers are clean or u will just make it dirtier. spray the cotton just a little bit and jam the cotton in the hole (all of it too). don't worry about it getting stuck in there, its not hard to get out. Use the cottonswab stick to swirl the cotton around and then twist the stick and pull it out at the same time. The swab should come out and your lens should be clean. repeat if needed.
