Araldite goes soft and gooey at boiling water kind of temperatures. Heat it thoroughly so glass and Araldite are at about 90 deg C, then scrape it off with a single-edged razor blade.
On the Mohs scale, a pencil lead has a hardness of 1; a fingernail has hardness 2.5; a copper penny, about 3.5; a knife blade, 5.5; window glass, 5.5; steel file, 6.5.
ie - a steel knife blade won't scratch glass, so scrape away, but don't try to file it off