Sarracenia- carnivorous plant not doing well

[monivik]

So I decided to get a carnivorous plant, after reading that they can be handy to have around your orchids and other plants. So I thought let me start by getting one, a sarracenia. By the way I've noticed a lot of fruit flies around my herbs (parsley, koriander etc) and the orchids lately.

I've had the sarracenia for a couple of weeks now. But it doesn't seem to be doing that well, at least I think so (see picture). I read that they should be constantly moist, so I keep checking every day and I make sure it never dries out. I also make sure it's not in the direct sun light.

I also read that one shouldn't water these plants with tap water, but preferably rain water. Honestly I don't have any way of collecting rain water. So I've been using filtered water. You know from a pitcher with a filter, the kind of water we drink.

Maybe worth mentioning: I water my orchids with regular unfiltered tap water though, I've been doing this for years, because I've been told that the water where I live is soft water, and that that's not that bad. Can I use this same water on the sarracenia?

The other thing is the temperature, as we are currently in summer here, the last couple of weeks the temperature has fluctuated a lot here, outdoors as well as indoors. My house has most of the time been arround 24-25C (75.2-77C) but it has also been as low as 21C (69.8F). However, this week has suddenly turned into a heat wave, inside my house is 30C (86F). I live on the top floor apartment with a flat black roof, and I do not have airconditioner.