I have a relatively basic question about LFS as a top layer in my Nepenthes pots. I've been growing just a couple Neps (ventratas) for about 6 months, and they have a top layer of LFS. They are groing in houseplant conditions and doing very well as far as I can tell...pitchering, increasing in size, etc. Unfortunately, I can't seem to encourage the LFS to do quite as well. Both plants have some live spagh on the top, but most is dead, and even the live pieces have blackened ends.
Question: What do I need to do to encourage healthier growth of it so it looks more presentable and possibly means better growing conditions for the Neps. I use distilled water, have the pots on sunny windowsills, and mist daily (although I do miss a day pretty often).