Hello all,

I have recently installed below NPN NO Proximity for auto bed leveling, however, I noticed it doesn't detect anything unless I touch the little orange part at the bottom of it (video attached). Any idea why is it acting this way and how to fix this??


P.s.
When I touch it, it works normal, I.e. if I lift z axis light switches off, and if I lower it, light turns on, ofcourse as long as I'm touching it.

Using:
Ramps1.4+Arduino Mega 2560 v3
Marlin firmware

Video of problem
https://youtu.be/xOAbFPqjPtw

Sensor
https://www.ebay.com/ulk/itm/303252795508