I've attached a pic of the leaf of a Schismatoglottis I got recently. It's otherwise happy, healthy and flourishing but a few weeks after new leaves emerge they are covered in a slightly brownish powdery/grainy residue and I've noticed what looks like a fine web on the leaf. There are no visible insects/spiders/creepy crawlies, so I'm not sure that the webbing is spider related. Hopefully the pic is good enough to see what I mean, if not I'm happy to attempt a better shot...
I appreciate that a Schismatoglottis isn't the most commonly grown of houseplants, but any info on similar symptoms on similar plants would be gratefully appreciated.
Thanks!