Moffatt MSF615 faulty grill element?

Hello, i had never used the grill until yesterday, the oven came with the house, the grill elements were a bit rusty so I applied some grease cleaning product and apparently didnt remove it entirely. I tried to cook some sausages and a lot of white smoke came from the inside, and the sausages burned. Now the grill elements won't heat.
a) what is the best way to remove the dried grease in the elements
b) do you recommend to remove the elements and check the supply?
Thank you very much

Alfonso
May 2020