Bread-Bakers v109.n008.14

I would be willing to guess your griddle was not hot enough.  Corn 
tortillas need an almost, almost screaming hot griddle.  I've made 
them on electric griddles and they turn out with about 40% of the 
flavor as they do on a good hot comal (griddle).  I'd say they come 
out tasting something similar to what you would imagine playdoh would 
taste like if it were cooked.  Flour tortillas need maybe 2/3rds of 
the heat as do corn and actually I have not worked with a griddle hot 
enough even for flour tortillas.  The difference is quite 
noticeable.  I would not recommend electric griddles for making 
tortillas.  I have never worked with the tortilla grills out on the 
market though.  I would challenge anyone who has made corn tortillas 
on an electric to try making them on a comal (griddle) on a 
stove.  Personally, I prefer gas stoves because I can fine tune the 
heat more.  I don't like electric stoves though, so maybe it's just 
my bias.  I'm convinced electric stoves are the spawn of Satan.  I 
have made them on electric stoves though, in my apartment days.  I 
swore to God and the angels I would never live in an abode sporting 
an electric stove, but I digress.  You do not need to add salt to 
corn tortillas.  I've never heard of adding salt to the masa 
(dough).  My mom always used plastic from grocery bags, they seemed 
to stick less. Don't ask me why.  I tried to make them once with some 
other type of plastic and complained to my mom, she just corrected 
me, got out a grocery bag and schooled me.  Good luck and enjoy.

Your Fellow Bread Baking Fiend,

Pedro