Could the dryer vent be clogged? This is really gross, but my dryer had a nasty, nasty smell once, and it turned out that the vent was clogged-- by a dead MOUSE. Yuck.... So maybe you should check the vent.
Sorry, I know that's gross, and probably with a fishy smell that's not it at all, but the only thing I can think of is a clogged vent.
I don't think you need a new dryer, though.
me , he , my three , , and -- and the one we lost