Snow blower gear?

I had an oil leak recently on my snowblower and I fix it. There was oil all over the place. Now everything is working except it's not moving. I know it's because there was some oil on the clutch. So when I press down the gas the clutch(rubber wheel) is slipping on the other thing(a metal) that the belt is on to move the wheels. I was wondering if you guys have any tips about cleaning the oil.. I tried clean it with gasoline, then I sand it, then I scratch it, I even use the torsh on the rubber to see if it would help! Now it works on gear 1.. pretty slow

Thanks!