Re: Sim bathing in random clothes Maxis only, no CC.
Whenever you add, remove, or change mods, deleting the localthumbcache.package is good practice to prevent any lingering problems in your game from outdated info.
As for refreshing your folder without losing your stuff...Google "The Sims 4: Game Folder Refresh" and click on the YouTube video by Onyxangel in the results. I haven't watched it myself, but it's often posted in the MCCC Discord to tell people how to do it.
Also, back up your saves, Tray, Mods, and (if you wish) Screenshots folder to another drive, too.
Finally, you're welcome! 😃