desperate for advice from anyone who has persuaded a biting toddler to stop

[MamaChocoholic]

ds2 is 21 months and has been biting for about 3 months. we send him in a corner for 20 seconds or so, then he says sorry and hugs the bitee. but it's getting worse. he bites dd (his twin) hard enough to leave marks for 3 days. he bit each of us today at least twice and has started hitting too. now dd is understandably starting to bite him.

can anyone offer advice? getting desperate.

Biting back is the old remedy. But frowned upon now. Colditz idea is the best I've seen on this thread. Pointing figure right in the face of the biter and yelling no. don't suppose the child psychologists would approve. Still they're probably not the ones getting bitten.

I agree with purplepansy. That's basically what I was told by an expert in child behaviour when I investigated how to stop my ds biting. Almost knock him out of the way to ignore him was how I was told! It stopped the first day! I was told not to redirect (its 1:1 attention) not to do the hug and say sorry (again it focuses on them, they bite, then get told they're being good for saying sorry and this is positive attention), daycare was separating him (which is good positive attention for him as if he bites he got 1:1 attention with a teacher) so the total ignore was the solution for us. I was also told that the focus should always be on what happens after the bite, not what led to it.

In my case the biting was always at daycare so I was never there to see it.