Once they go really aside from replacing, the only other longterm solution is to remove it completely with alcohol, I would not use acetone as it can soften plastic.
So far I have not had any issues with my Elektron gear with this coating, but I have had the problem with other gear from monitor speakers, to computer peripherals to AIAIAI headphones to moog parts.
I am not a fan of the feel of this stuff or the look either, but when it goes gooey it makes the gear useless, I actively avoid buying products which use it now.
Not sure if it is relevant or related but since using alcohol hand gel I noticed door handles in my car getting sticky. Could be coincidence or could be related to the hand gel, however I will say with 100% certainty that I have had this coating go bad on other products years prior to using alcohol hand gel, so I’m not suggesting it is the only possible cause, but it might be a factor in some cases.