The only way to get rid of AA is to do a lot of cold approaches. There is no other way around it really. AA stems from a fear of being strongly blown out i.e. fear that a girl will yell at you. That rarely happens though but when it does it can really knock someones confidence and bring back strong AA even after they thought they got rid of it.

The best thing I have found for when you get strongly blown out by a woman is to try to keep approaching until you get a really good response from a woman again. Then that good response boosts your confidence again.