I've found that putting 1/2 cup of white vinegar in the rinse cycle gets smells out! If it doesn't take out the odor the first time, I mix the vinegar (a full cup to about 1/2 to 1 gallon of water-not an exact science) with water and soak it over night. Best part is it is safe! You don't have to worry about him sucking on chemical residue. Good luck!