not easy, they will stay clean a long time now
your C27 jacks are further apart, much easier to clean. one of the changes from prior C26 which had tightly spaced jacks like mine
http://www.roger-russell.com/c26pg.htm#c27
http://www.berners.ch/McIntosh/de/Frame_McIntosh.htm
mine are tight together
http://www.berners.ch/McIntosh/en/MX110.htm
your C27 jacks are further apart, much easier to clean. one of the changes from prior C26 which had tightly spaced jacks like mine
http://www.roger-russell.com/c26pg.htm#c27
http://www.berners.ch/McIntosh/de/Frame_McIntosh.htm
mine are tight together
http://www.berners.ch/McIntosh/en/MX110.htm