Dave and Betsy-- Try using the "Green bag" that are advertised on TV and in some stores! We got some for Christmas and have used them and they really do work! Don't know how but they do work! They make special ones for bread so if you can't find them right off the bat keep looking and you'll find them! Good luck!
Oh, by the way, moldy bread is good for you-- it has all that raw penicillin in it so you don't need to go to the doc as much!!