I'll jump in and make a few notes here, even though I'm less experienced than everyone here:
Drosera isn't dewy and has no color on "hairs" (and isn't an Albino cultivar)
This probably is an issue of not enough light.
Drosera isn't dewy, but has color and medium is consistently wet
This just happened to me recently with the D. capensis x spatulata hybrid I have.
First thing to ask yourself is if it's too hot for the sundew. This could be that the plant is too close to a grow light (that was my problem) or if where the sundew is located is just too hot in general. Someone can correct me if I'm wrong, but the subtropical to tropical sundews do good in 70-85 degrees Fahrenheit during the day and 64 at night is as low as you would be okay with it getting to. 90 degrees Fahrenheit could be
possible if you've hardened the plant to it and if you've found a way to keep the medium moist during the time it's in that climate.
The other thing to check is if the air you're growing the plant in is bone dry or not. Cape sundews and spoon-leaf sundews don't need a ton of humidity, they can adjust to room level humidity. Having a cold-air humidifier won't hurt, though, so long as you're not turning the room the plant is in into a sauna and there's somehow zero airflow (that can lead to mold).
Drosera isn't as dewy, but has color and medium is consistently wet but there's black tips
This is possibly due to humic acid build up. You can gently pat the top of the medium, it's probably a peat and perlite mix that you have, with a paper towel and top water the next couple of days to wash out any excess humic acid. Don't wash it too much, though.
After those it's a matter of
- Have you repotted the plant recently?
- Are you watering it with distilled, reverse osmosis or rain water?
- Is the plant in the correct potting medium?
- Does the potting medium have any fertilizer in it?
Some Drosera are a bit of drama queens, Capes especially, but once you give them consistent bright but not super strong light, a moist medium, enough humidity and feed them every other week they'll do fine. You'll have some drama but eventually you get the hang of it and know how to handle them when they get whiny.