this is a well known phenomenon that comes up a lot with new socks or old socks washed in detergents.
felt socks are synthetic and covered in microemulsifying polar oil, mix with ions in saltwater and it becomes a detergent that skimmers react to...
mesh socks had an antibacterial detergent used in their manufacturing cause lotsa bugs can eat mesh
So theoretically hot RODI rinse, and a lot of it, would be best but probably couldnt get it all out...
Also, sock or no sock question comes up on RC twice yearly at least and large polls always come up in favor of using socks by a lot...