Judging from that pic.. I'm guessing that's an orchid pot. And judging from that dew.. I'm guessing you fertilize that orchid.
Whatever those sundews are, they're suffering from some serious fert burn.
Probably still a lot of fert in the media.
I know of a place where D. rotundifolia is said to grow on floating logs from conifer trees. Wood-based media should be a possibility for other species besides capensis.
A cold one that is not cold is scarcely a one at all. - SB