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I just printed one, all was going well until I got to the hinges that print vertically, once i tried to break them, they basically instantly snapped along the layer lines. Is there any way to fix this? Do i just need to be more gentle, or is there some setting I can adjust to make the layers adhere to themselves better?

I have an Anet A6 and the settings were:
Temp: 200C, Build Plate: 60C first layer, then off, 20% Infill, .2mm layer height, No supports
Any help would be greatly appreciated :)