fastidious
fa-STID-ee-usadjMeaning very fussy about details, neatness or cleanliness; hard to please
Memory hook FAST-TIDY-ous: tidies FAST and often. Victor tidies fast and often: one crumb on the café table, and out comes the broom. He is fastidious.
The fastidious cat refused to eat from a bowl with a single crumb in it.
In context Most of the campers didn’t mind a little mud, but Victor was fastidious: he wiped his boots after every few steps and folded his sleeping bag into a perfect square.
Similar fussy, finicky, particular, meticulous
Opposite sloppy, slovenly, careless
From Latin fastidiosus, “squeamish, hard to please,” from fastidium, “disgust.”