Is there some common cleaning substance to use?

Is there some common cleaning substance to use? Images

Is there some common cleaning substance to use?

Is there some common cleaning substance to use? Description

I have a beautiful new travertine sink and (http://maplered.com) Counter (http://GialloFiorito.com) (both filled) and (http://maplered.com)  
walls which are not filled. I don't think I need to clean the walls, 
except for dusting. But the sink is getting sort of slimy. Is there 
some common cleaning substance I could use?

Thank you!

Lucy Scanlon

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