I use small bits of reflective tape as well. I cut out circles with a hole punch, top, bottom sides and a couple of the arms. If you go around after or near dark with a bright flashlight, it will show up.
You need to realize that the GPS signal is very weak, not a high powered output at all. Easily masked by your roof, cement, trees lots of snow, thick with precipitation clouds and so on. One other item is if you have not used your drone in a...