Call customer service and perhaps they will send you a replacement device. I would not mention about hand sanitizers or lotions, just leave that part out. Just tell them the paint is coming off some of the keys.
I did take the phones to Verizon and THEY are the ones that told me it was because I wash my hands, or that I use hand sanitizer. And that it isn't covered under warranty.
Oh, I understand now. They came up with the idea of hand washing or whatever. I know you stated you went by a Verizon store, but call Verizon's customer service and you might be able to get someone to send you a replacement. Good luck,