Kath, there is a difference between 'squeaky shoes' with air/gel pockets and your saucony hurricanes. Air and gel shoes provide their cushioning through the air or gel packets, so if there is a leak, then the shoe needs to be replaced.
However the Grid system used in the Hurricanes doesnt rely on air cushioning, as it is actually the Grid walls and the way that they are arranged, that provides the cushioning. So if there is air escaping, then it is not likely to affect the quality of the cushioning like it would with air/gel cushioning.
Having said that, it might be worth seeing if you can swop them for a new pair, I have had a pair of shoes that squeaked and it was quite embarrassing running in them!