How do I install the sensor(s) if there are slats narrower than my sensor(s) for the foundation that my mattress rests on?

If your mattress sits on a slatted foundation, metal grid, or mesh, ensure the sensor is positioned on a solid/flat surface so the sensor is pushed evenly into the mattress when you lie down. The sensor needs to make firm, evenly distributed contact with the mattress to function properly. If the openings in your foundation are larger than the sensor, use a thin piece of plywood or plexiglass that spans the holes to ensure the entire sensor makes contact with the mattress.