They came up between the floorboards at first, a little like smoke, or perhaps mist because nobody seemed to suspect fire. Tendrils crept into the various rooms, up the stairs and down into the root cellar.
They made things strange. Not uncomfortable, exactly, or not that anyone could articulate. There was an atmosphere of oddness, of unrightness. A glass that had been polished and put away would reappear on the table, smeared, with a yellowish sediment in the bottom. A bed that had been neatly made would be tumbled and creased, the pillow tossed on the floor. A towel in the bathroom would be wringing wet when nobody had used the basin or shower since the previous day. Everything could be ascribed to poor memory, to human error. But everything added up. Nobody was harmed, but nobody was happy and eventually they left. They sold it, of course, but the next residents, and the ones after that had the same experiences. Ridding the house of humans took a few years but they could afford to wait.
Next, they turned their attention to the small things. The bugs that lived in the cracks, once there were no humans to clean the place, found their cracks filled with unpleasant textures and smells. The mice under the kitchen sink had a nest damp from drips even though the taps were no longer working. The birds that built homes in the roof space had a feeling that predators were constantly overhead. They all left, not at once, but one by one, reluctantly but in the end with relief.
Then the moss on the roof failed to thrive. The lichen that tried to establish itself on the front step found the atmosphere polluted despite the lack of anything within miles that could affect it. The creeper on the back wall rotted.
At last they had the house to themselves. It was a beautiful house, built from aged silvery grey wood with large airy window frames. It was the perfect home and it had taken a while to get it exactly the way they wanted and it had taken a lot of work but at last it was finished, and they settled down. Anyone passing, though very few ever passed, might have heard, soft on the evening air, a sigh of contentment.
(The picture is not mine. It’s a slightly photoshopped version of one I found on Pixabay by Wyosunshine. The information for the photograph said it was free for even commercial use. It’s very similar to the one used for a prompt that inspired this ficlet. Given a lack of wooden houses anywhere near either of my homes, I felt obliged to go looking and make sure there was no copyright violation. One or two of you might have seen the ficlet a while ago on my personal journal.If so, ignore!)