Fanuc IRVision Laser Exposure Settings

Have new model year parts in and they are shinier than previous parts. It's causing all sorts of issues with the laser. The 2D identification is working fine, but the laser (distance measure?) is not good. We have 3 attempts to find the part with exposure settings of 20, 30, and 15. If we're failing on all 3 exposure settings, is it better to increase or decrease exposure? 2D exposures are 30, 15, and 45, and we're not having any issue at any exposure with 2D.