The shutter needs a good clean and service. Unless you are confident in working with miniature clockwork mechanisms, it is probably best to send it out to an expert - Might be worth contacting gandolfi and see if he can recommend anyone in Denmark to do the job.

I have an MPP myself - Even with the viewing hood, I find it easier to take it off and use a darkcloth and then I can get in there with a loupe for focusing.