finickier

/ˈfɪnɪkiər/
adjective
  1. More finical; more particular or fussy about small details.
    • No one was finickier than Aunt Clara when it came to setting the dinner table.
    • He became even finickier about his coffee after visiting that specialty café.
    • Of the two cats, the older one is finickier about where it will sleep.