I keep seeing all the great photographs of Nepenthes and the tanks/greenhouses look so clean. What is the secret? Everywhere in my greenhouse it seems algae, ferns, mosses, and other green things crop up whenever the humidity is high. Do all of you scrub your benches, pots, and walls weekly? How do you do this once the vines get thick? Have any of you found a good way to clean the algae off "bubble wrap" that is used inside to insulate greenhouses? I assume most algacides will harm Nepenthes.