Flex with clear materials creating very bad reflections/refractions

Hello

I am trying to render substrates with layers of clear plastics or glass but when i use the flex feature the bending creates lots of refractions that make the image really bad. Is there a way of removing this effects? I tried changing all the parameters on the materials and lighting but nothing really changes it.

The flex is on the top right and down left corner.

Regards

SolidworksPhotoview 360