That isn't ambient occlusion, it's realistic contact shadows :) Ambient Occlusion is a fake (to simulate contact shadows back when GI didn't work). Would be best to see an image of what you are getting, and an example of what you would like, to say what the best way forward is. If you want no lighting at all for example, may be best just to use Self Illumination on your textures. But if you want realistic lighting that bounces around, inevitably some placed will get more and some less bounced light.