Spock has ocd and he just can’t handle mess and dirt, he needs to meditate a lot so he won’t start cleaning all the ship.
Mccoy found about it first when Spock was in sickbay for a week after he got injured in a landing party and he found all of his hypos organized in alphabetical order and cleaner than it ever was before.
Jim found about it when one day he got back to his room later than expected and Spock was in the middle of cleaning and organizing everything since Jim is such a messy person.
When Jim got upset about it Spock explained that he couldn’t meditate for 2 weeks after he saw his room which is the reason for his bad mood in the past weeks. Jim forgave him immediately.
Sulu found about it when he got into the ship’s gym and everything was organized from small to big and the gym looked like it was brand new, just after Spock was there.
Spock feels quite good his friends accept him and his ocd.
OCD Spock gives me life.