i tried everything i just have to learn to ignore him when he is so naughty, he even bites himself sometimes.

i olso agree that its all about consistancy .......

My 17mth thankfully doesnt bite much now, she mostley bite when her teeth where coming so i would just say a firm No thats not nice, but i also have tried the biting back and it did work with some of my children because they realised that biting hurt after they got bit back so i would say try what is best for you either way helps, My hubby used to put our oldest granddaughter in a corner for a few minutes with no attention of either family member  , out of harms way but she was able to be seen and soon realised that when she bit at Nanas and Poppys thats what would happen but she mostly bit out of frustration eg when loosing a toy etc with other kids around.. hope it all works out for you.

I have a 16 month old too and thankfully he doesn't bite, though he did a few times. What I did was to put him down and to walk away from him. I showed him that if he was to bite me or anyone else, whatever "closeness" we have was going to have to stop. If I was holding him, I told him no biting and put him on the floor and I stood several fee away from him with my back turned. I only did this for a minute and then we went back to whatever we were doing.

You may also want to try exagerrating your hurt by crying for a couple of seconds while your back is turned.