Loz
He's only keeping the dust off the artificial ones.
Reminds me of when I had an office on the top floor. We had brought the builders in to find the leak in the roof as I often found small puddles of water on the floor. They patched the roof but obviously hadn't done too great a job as most Monday mornings I arrived in to find another small puddle.
Got in surprisingly early one Monday. I refused to spend 90 minutes to 2 hrs. in a traffic jam when after 9 a.m. I could get there in 20 minutes. Quickly found the cause of the puddles - Yes, you've guessed it. It was the office junior making sure all the plants looked their best. Every single one of them was artificial but she was totally convinced they looked heaps better since she'd been feeding them - water & baby bio.
Linda