fastidious

giving careful attention to detail; hard to please; excessively concerned with cleanliness

Difficult to please; delicate to fault; suited with difficulty; squeamish; as, a fastidious mind or ear; a fastidious appetite.

Latin fastidiosus, from fastidium - disgust

“Do you know, Algy, the most expensive position in the world is a widow's." "You needn't be one very long," growled he. "I'm so wretchedly fastidious, don't you see?”

— George Meredith, Complete Project Gutenberg Works of George Meredith

Kwame scrubbed his Melbourne kitchen until it gleamed like a mirror, his fastidious nature leaving not a speck unturned. Even his cat, Spot, who normally sauntered about with indifference, looked shocked at how tidy things were—almost too tidy for a Monday afternoon.

Cyrus swept the marble floor of Bangalore's ancient temple with such precision that even a grain of sand under the lotus pond statue made him pause, his fastidious gaze scanning the surface until it was spotless.

“More generally, enriched media is an agar variety that is infused with the necessary nutrients required by fastidious organisms to grow.”