Were you just randomly spraying stainless steel cleaner around your kitchen? Probably not, so I don't think that would be the cause. Hard to tell from a close up photo, but it is probably just splashing/pooling of water from your sink area that is seeping up from the counter and wicking up through the porous marble tiles. Were the tiles sealed at all?

Stop using the sink for a few days to see if some of the tiles dry out. Place a fan on the area to speed up the process. Also check for any slow leaks below the counter.

What was used between the tile and counter, caulk or grout? It should be caulk.

Thank you for your reply! I did not leave a lot of water on my counter and there is no leaks in the counter. I will try to place a fan to see if it helps!