Any methods for desensitizing the glans long term? ( Except Mantak Chai - Sharpening the Knife)

Numbing sprays and pyt balm worked for me couple of times with good planing, therefore I decided that my PE is definitely related to over sensitive glans. Is there a way to reduce the sensitivity of glans permanently like Mantak Chai- Sharpening the Knife? Also the concept of Death Grip/dry masturbation leading to 0 sensitive penis in some people makes me think that there must be a way to find the balance.