I too grew them inside as a kid, along with a few common Drosera , at a South-facing window for some years, without any real issue -- and watered it with a bit of the distilled water my mother used for her iron. Occasionally, it was fed crawling insects from outside or caught things on the fly. When it rained or was especially sunny outside, it spent time in a side yard and was well-fed.
Even now, I have a rotating number of them on my windowsill, though they remain outside for the most part. The humidity -- I'm less than a half a mile from the beach -- does wonders; and i haven't had t o spray them or keep them covered in years . . .