I had horrible issues with it. So I did 2 things. First I bought these:

https://www.amazon.com/dp/B078H9C7YD/ref=cm_sw_r_cp_apa_glt_fabc_CTE9MTWT51BGXDA8RBS0?_encoding=UTF8&psc=1

They helped some but I still kept whacking it on door frames and stuff, which sucked, but i had far less issues.

The I moved it to my stomach, they say you are not supposed to and the readings wont be as good but I noticed no difference, do use your own judgment there.