I rent a place.
There on granite surface I was lighting incense, and did not remove the burnt ones right away. They leave small stains coloured light brown.
I tried to clean with domestic cleaning device, but it didn't work - at all.
If I try mix of flour or that of poultice, I am afraid I might damage the surface, make bleached stains, or damage the surface in quality and shine.
How can I safely remove stains - is there a way? I live in small town, and fear that here it doesn't exist professional cleaning service.
I need help especially because I rent.
Can you, please advise me?
Thank you.


