Here is a goal: How to use Pam to get rid of soap scum and hard water stains?

How would you accomplish this goal?

Choose your answer from:
(i) Shake the can of Pam or cooking spray and spray on the stain and surface that needs cleaning. Let stand between 5-10 seconds then rinse surface with water or soapy water.
(ii) Shake the can of Pam or cooking spray and spray on the stain and surface that needs cleaning. Let stand between 5-10 minutes then rinse surface with water or soapy water.
(ii)