I have a Miele K851 iD fridge. I have acquired it second hand but the fridge door will not close. It goes so far, until about 50 mm away from close and then offers a resistance. Yes I can push it shut from there, but is springs back open. There does not seem to be much adjustment possible on the hinge. Is it a hinge or magnet problem? Should I replace the hinge? Do I have to use the Miele hinges ( about £80 each on line ) or are there alternatives? The freezer next door, with the same hinges, seems to work fine….I can’t see anything wrong, but there again, I don’t know what I am looking for!