This is a tough one! I was in a block swap and I got several blocks that smelled from cigarette smoke. I hung them out doors in the wind. Did that day n night for several days. Then I hung them in our garage and that was horrible. When the heater came on it filled my house with that smell. But it finally worked. I was not able to throw the blocks into the washer or it would all unravel.My parents both used to smoke. I never did. I am super sensitive to the smell. I hope you find a solution. Please let us know what works for you!