It's a little surprising because Lexus usually gets very good marks on build quality. I'm sure the dealer would replace the wipers if they are indeed scratching your wind shield. Pictures would be awesome.
Before speaking with folks at the dealer, you might want to ask some dealers if you can look at NX's they have on their lot. At least then you can see for yourself without them telling you otherwise.
A forum community dedicated to Lexus NX owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!