Canon SCOOPIC 16 - Manual (Page 60)

Cleaning the Aperture Section
It is important that the aperture section always
be kept clean. The aperture section (the section
where the film is held by the pressure plate),
through which the film passes, is liable to accu­
mulate dust or grit from the film. If left alone,
these will scratch or soil subsequent reels of
film. The aperture section can be kept suffi­
ciently clean with a brush. It is best to clean
this section whenever new film is loaded. Do not
use anything hard, such as a metal brush.