First you go on transformice ( www.transformice.com )
Second you login your account ( you can't get free cheese if you go on a guest account. If u don't have a account go and sign up )
Third you click on the chat bar and type /Facebook and press enter 
Then you got 20 cheese

To get the 40 cheese 
First you go on your account
Then you click on menu
Then You click on change password
And THEN you type your email twice
Then you go on your email 
Then you get your code
Then paste your code to the thing that you put the code
Then u get free cheese earrings and 40 cheese

Hope you enjoy getting 60 cheese
And use the cheese carefully too