Use some Dove soap and keep scrubbing it, making sure to also rub the cloth together. Afterwards, use some conditioner before scrubbing again. Scrub for about another two minutes, then use a damp cloth to wipe the soap marks.
Grab a nice, clean microfiber cloth and use a product like Lightning Fast Stain Extractor that's specifically designed to get rid of spot stains. Start from the outside of the...
That will depend on the surface. Usually, you should use pH neutral products in porous surfaces, like marble, to avoid problems. On the other hand, some sealed surfaces like stainless...