I have come to realize that getting through that bitch shield has a formula

1. I sometimes say something like this in total confidence " Do you believe that psychics can truly predict the future?" She's in bitch shield mode so she would usually say "no" so i will say "well i know some palmistry and i think it will work on you"

2. If you can pull of the cold read she will have no reason to keep the bitch shield.

3. Remove bitch shield = coldread+DHV

i bet that works a treat, 60% of the time it'll works everytime!

i found the best way to break the shield is to be a bit bitchy back. or just laugh which ever seems most appropriate at the time. just dont go over the top.
the idea to being a bit bitchy back is if she sticks around shes obviously gona like you and also she wont like the tone and will eventually drop it.
the laughing just DHVs you, simple as that. she cant keep it up forever if you dont take her seriously.

at the end of the day the bitch shield is there either cos she is a bitch or because you've not demonstated high enough value, go change your image if your getting it a lot.