This blog keeps getting spammed

As anyone who follows this blog knows, I keep getting spammed with posts that appear to be written by me but obviously aren't - I've changed my password, but that doesn't seem to be stopping it. There was a period a year or so ago where this happened, and eventually it stopped - since I've changed my password, I can only guess that it's a hack of the blogger service or a third party - we'll see! If anyone has ideas on how to stop this, let me know.