guys i have the Dr. Mark Seward's - Determining Sex in Snakes

Learn how to tell the sex of any snake, safely and accurately with the techniques of probing and poping.
i don't have the probing tools so amtrying to find the sex with the popping method. the probing method is dangerous so i select the popping. am trying to do alla of i saw in the video . the snake doesn' allow me . he/she catch strong muscles. can't explaint itn
someone told me that you must hatching the snake for some time with some method to relax.
in my country we do not have reptile experiance.
what i must do?
the snake is 1 year old