Hi Dave, don't despair, iguanas in general sneeze out salt and you can see it collect on the nostrils periodially.
:i have a juvinile spiney tailed iguana and he's snoting all over the tank?? he shoots it really far and its white and i see it on his nostrilles. is this a cause for concearn like a respritory infection or sumtin?? :my tank is at perfect temps and stuff i'm just wondering if that was the same case at the pet store i got it from! :thanks in advace :Dave