Answer:
First off, I would really like to know why you started to begin with. That is a little strange. The main thing is to have will power. In anything you are trying to stop doing you have to resist the urge to do it. Depending on how much laundry starch you take, you need to decrease the amount over a month and over time you will stop altogether. You can also use the tactic to avoid being around the starch so that you don't have the urge to eat it. I hope this helped you in your odd need.