Hi, Weeg. First, a disclaimer: I don't hatch. Having said that, however, I'm an old grandma that's done thousands of loads of laundry and I do feel qualified to tell you that what is important about real estate is probably also important in incubating: location, location, location! Having your incubator located next to a window and in front of a drier may have been at least partly responsible for your dismal hatch rates, if not entirely so. The window could have been randomly chilling the room, especially at night and early mornings, and the dryer could have been affecting both the heat and the humidity in the room. As another poster pointed out, the thin plastic of the incubator would have made it very vulnerable to these changes.
You've indicated you'll find a more stable environment to hatch in, and I can't wait to hear what the results will be, once you find a more suitable location for your incubator! Best of luck to you!