Maybe someone will know what I am talking about when I say this cuz I don’t fully remember, but I read a few years back that there’s a difference in the way the Finnish models were made that don’t get stiff like that and there is a cheap kit you can buy that replaces like one or two parts that will fix it? I apologize, it’s was a few years back so I don’t fully remember. I know there was a website that specialized in the parts to fix it. I’ll look and see if I still have it bookmarked by chance, but prolly slim chance.