My father-in-law is a Rav and posek and he says that one SHOULD NOT toivel electrical items. Rather, if possible, one should unscrew a part of the machine, making it not usable, and then screw it back together. If that can’t be done without ruining the appliance, then it need not be toiveled.
But of course, each person should ask his own rav.
it is very easy for anybody to post My father-in-law is a Rav and posek and he says… everyone should follow the last line of the post. YW Moderator-72