We need a better photo, show more of the plant.

I'm a new owner of a nepenthe miranda and I bought it from a plant store in Half Moon Bay..her recommendations on care was shower water which I do once a week. When I get a chance I hang it outside in the shade but not in direct sunlight. I then bring it inside to hang. I do open the blinds to give it more indirect light. I give it shower water. I have been reading that distilled water is better. I trimmed off the pitchers to promote growth. Should I switch to distilled water and would repotting it into a larger pot for more growth? I still have one mature pitcher still on the plant.

I'm a new owner of a nepenthe miranda and I bought it from a plant store in Half Moon Bay..her recommendations on care was shower water which I do once a week. When I get a chance I hang it outside in the shade but not in direct sunlight. I then bring it inside to hang. I do open the blinds to give it more indirect light. I give it shower water. I have been reading that distilled water is better. I trimmed off the pitchers to promote growth. Should I switch to distilled water and would repotting it into a larger pot for more growth? I still have one mature pitcher still on the plant.

{{!gwi}}

Switch to distilled or rainwater. Bright, indirect light. How big is it's pot?

This is kind of late, like four years late, but hope your plant didn't die. That black stuff is called "black rot" and there's an excellent youtube video on how to save your plant here: https://www.youtube.com/watch?v=RUin7nAIevo

It's a video by John Yates "fixing black stem rot in nepenthes"...very helpful!