Do you have problem to get rid of stubborn stain on the baking tray?

Especially when it is charcoal black and rough to touch!!  I found a solution to it.  Try this.

Cleaning steps:

1. Wet that stained area with water.
2. Sprinkle washing soda on the stained area.
3. Pour white vinegar onto the washing soda.  It will bubble + very mild smoke !!
4. When it stop bubbling, the stain can be scrubbed off easily.