I haven't tried to adjust any settings. You might try screen brightness, maybe? Any screen protector will need some maintenance. The trade-off between the Zagg HD screen protector is that, despite how well you install it, it peels up and discolors eventually from the oils/dirt upon contact. These adhesive ones need to be replaced over time. The non-adhesive one on the Defender can be cleaned by taking the case apart instead of unpeeling the old proctector, cleaning the screen and re-applying the replacement one.