I keep seeing holes appearing in my pothos leaves, but I can't find figure out what is causing it. At first I thought it was just the stress of moving to a new place and a colder and drier environment. I have it hanging in a northeast facing window. At my last place it was next to a southeast facing window, so I don't think it is getting burnt. In its new spot, it gets 30 minutes to an hour of direct sunlight at 8am. I've looked all over the leaves and I don't see any bugs on it. The most I have found is some black "droppings". Today I saw some white stuff on the leaves. In general, it's healthy plant. I just want to nip it in the butt if it is a pest. Any thoughts on what it could be?