Pass or Fail

I have been a very heavy smoker for years. I smoke all day every day but have quit recently for an upcoming hair test. By the time I have to take the hair test I should be about 90 days clean. I will get my hair cut one more time and it should be about 1 in to and 1 and 1/4 long. Will I pass or should I be trying some cleansing methods like MacCujo?

Please I really need help on this If anyone could respond it would be greatly appreciated. Just simple yes or no replies will help big time.

Thank You take care and I wish everyone the best!