Do you use hand lotion or hand sanitizer?
Trim like this has been an issue since about 2007 from VW to Ford to Hyundai, etc. The manufacturers that make it for the auto industry claim lotions and sanitizers cause the finish to break down. Also, the oil in some people's skin is more damaging than others. If you take your car to ford, they will have to take pictures and send them to Ford for authorization. If Ford approves it and they replace them, they most likely will do it again unless their is action on your end to prevent it.
Will aka Misfire
2003 LX "traded in"/2010 SES "traded in"/2012 SEL Hatch "traded in"