Nektarios is an excellent host, very helpful and attentive. He picks you up in the port and brings in 5 minutes to his house, showing where the backery and grocery are located. Should it happen that you have to find his place alone, here is a supplement to the Google map regarding the exact location:
The street name is "12th October 1944". This is a steep street, the middle part consisting only of steps. Above the steps the 4th house on the right is what you are looking for (there are no house numbers), to be recognized on the unusual construction that the house door is not at the street level but on an entry platform 10 steps higher.
The flat on the 2nd floor has a terrace on 3 sides with excellent view on the mountains, the city and the sea. The room is comfortable, clean, and could be pleasant even for a longer stay.