According to Osho, no technique can truly de-condition the brain; all 'de-programming' merely replaces one program with another. The sole way is meditation—not a technique but relaxing into your own inner silence, without guides or scriptures, until thought subsides. In that choiceless awareness, conditioning dissolves and your pure, Buddha-nature—innocent, clear, joyful—reveals itself.
You can’t erase conditioning by adding new methods; just sit quietly and let thoughts settle, and the old programs fade by themselves.