I had an American friend in Rovaniemi who lived in an Alvar Aalto designed block of flats. Beautiful. White against the snow. The huge triple-glazed windows were hinged at the top and only opened inwards so as not to spoil the smooth lines of the exterior facade. To clean them she had to get four neighbouring Mormon missionaries to come round and hold the heavy expanses of glass up for her.

There was also a rumour that he didn't put any space for cleaning equipment into Finlandia Hall and someone had to design a tasteful shed for it but I don't know if that is true.