Soak in Dawn in water as hot as you can stand it. Mush it, agitate it through your hands, then when starts to cool down do it again. I sometimes do this in a bucket so I can let it sit over night. When you do this you should be able to smell the chlorine on your hands. Something else you may want to try also. I was in Walmart looking for some synthrpol and came across some Fels Naptha and laundry bar soap. I bought it all. Trying them on different items. I still have couple shirts that smell of ol smoke. DH says often my kitchen is like a lab.