Thx for the reply, although unfortunately I can t view the pictures for some reason.
I have cleaned the laptop several times now. Last time (after this post!) I cleaned the "air filters" and it became a lot better. When I get my new vacuum cleaner I will clean them again from the "outside" and see if it becomes even better. If I m not satisfied I`ll remove the cooler, clean the laptop also below it and exchange the heat transfer paste. I have seen several videos now on how to do it and will be carefull if I have to do it.
Best Regards
frighter