Replacment k70 Red keys ASDW need help :)

Hi people



I got a iusse my K70 ASDW keys ( red ones ) are rubing off i have had the keyborad for 6 months and i got a feeling its nothing to do with me so the Q if should buy a Replacement set of these and where can i get a set of them or Sould i call the place where i got it from ( ebuyer )