Ok people... I finally found a phone number to contact Mitchum about their lousy product! Make sure to save the deoderant because they will only refund your money if you have the code on the bottom of the tube.
As mitchum is the only deodorant that works for me I had to find a solution for the crumbling dilema. After each use I run it under water for a couple of seconds and replace the lid. I solved the problem mitchum deodorant needs to be kept moist at all times to prevent crumbling.