Touch wood it has never happened to me with my 4iiii but my old Avio PowerSence was prone to water ingress (the newer Avio is supposed to be better) so I would use an old inner tube over it and the crank.
Touch wood it has never happened to me with my 4iiii but my old Avio PowerSence was prone to water ingress (the newer Avio is supposed to be better) so I would use an old inner tube over it and the crank.