Vinegar can be used to clean pans with.
The use of vinegar when cleaning pans is a good and natural way of getting your pans clean without leaving any soapy taste to the pans like some soaps can.
You can also sprinkle some baking soda into the pan and then pour some vinegar into the pan on the baking soda and allow it to fizz and then scrub the pan clean.
The baking soda and vinegar will help to lift off any grease, oil and other food residue from the pan and make it easier to clean the pan.
If the grease, food debris etc are stubborn you can fill your sink with some warm or hot water and add some baking soda and vinegar to the sink water.
Then allow the pan to soak in the sink with the baking soda and vinegar for 30 minutes to a few hours.
Then empty the sink and rinse the baking soda and vinegar off the pan and scrub it clean.
For really stubborn grime on the pan you may need to use a good dish detergent such as Dawn dish detergent or a degreaser.