It seems funny to be told by a realtor/estate agent to remove the stuff on your fridge doors I've never heard of that happening here EVER! I can understand it would make for a neater kitchen but seems just a little over the top IMO, but there again we only have 2 small magnets on ours!!!
The front has special magnets and a couple of photos - our 2 dogs (both deceased now) and our kids. One side is FILLED with magnets of places we have been, and the other side has a notepad for lists! My philosophy is don't bother to clean it-slap a magnet on it
Our kitchen door has a collection of state magnets on it. If we travel far enough, maybe we'll get them all!