It was a cool day. I wore a pair of gloves that special designed for photographers. It has pull-back the thumb and forefinger tips to reveal your fingers. The tips are secured in place by magnets. When my drone was in the place to take off, I saw a warning of "calibration needed", I immediately followed the instruction to do the calibration. Unlike I experienced before, the calibration failed a few times before I got "Successful" indication. The situation was extremely unusual. I kept to get "calibration needed" and "calibration failed" so many times that it made me start to investigate what was going on. I did not see any big metal around the take off area. Suddenly, I realized there was two small magnets right in my gloves! And further more, I always use my hand take off and landing! I had joyful fly in the rest of day after I removed the pair of gloves.
If you are curious what the gloves look like, here it is: https://www.bhphotovideo.com/c/prod...Men_s_Stretch_Thinsulate_Gloves.html/overview
If you are curious what the gloves look like, here it is: https://www.bhphotovideo.com/c/prod...Men_s_Stretch_Thinsulate_Gloves.html/overview