Then it stays at 5 bars no matter how I hold it. I took a ziploc bag folded in half (therefore 4-ply) and wrapped it around the metal, and no matter how hard I

Then it stays at 5 bars no matter how I hold it. I took a ziploc bag folded in half (therefore 4-ply) and wrapped it around the metal, and no matter how hard I squeeze it or cover it, the signal doesn't drop below 5 bars.