as little as possible- and make sure the marble is sealed- it's afairly porous stone, for all its polish, and will soak things up. never ever anything with acids in it- which leaves out even things like windex with vinegar. mostly- there's little that water and a clean rag won't take off.

I see a couple of brands of marble cleaners / seals at Home Depot. Are these reliable or are there special brands to consider? I use a shark mop to clean the marble floors regularly, but the seal has worn out and they are now porous/opaque and absorbing a lot more dirt. I read about the bona stuff, not sure that is specifially great for marble, seems to be very highly rated for wood floors. Not my case. Any advice?

Hi Marcia, I have 12x12 honed calacatta marble on my bathroom floor. I'm using 409 Stone cleaner diluted with water to clean them. I also use the 409 on the vanity and tub deck so it makes it easier to have one cleaner. I'm too lazy and cheap to order anything more expensive and the 409 is available at my local grocery store. I have used diluted Oxy Clean to clean my shower floor which is also marble but it's a mosaic and has a lot of grout. I'm really careful with getting drops of Soft Scrub on the marble while I'm scrubbing the sinks but I think I'm going to just use the Oxy Clean mix on those too from now on. Neither product promises world peace but Pledge Multi Surface can clean stainless, glass and is MARBLE safe! I just picked some up and am going to try it out on an old remnant before I start spraying my bathroom mirrors and windows with reckless abandon! Update: Pledge Multi Surface is marble safe (I tested it on an unsealed, honed tile), cleans glass AND stainless. So, that brings my favorite, easy to get and marble safe products to a total of 3: 1. 409 Stone Cleaner spray 2. Oxy Clean 3. Pledge Multi Surface spray Did you save a few tiles to run tests on?

Getting ready to do an inservice for a client and her cleaning staff after an expensive remodel. Here's what we recommend. Most important tools for the shower regardless of material used: Squeegee and microfiber towel (used after each use, with ventilation fan always); MB-5 for regular wipe downs on all surfaces. Great for marble and granite and can be used on mirrors and glass doors as well. MB-3 periodically if you get build up of soap residue in shower. Damp mop the marble floors and the MB-5 can be used for this as well (minimal water and would not regularly steam clean marble floor as it will break down sealer over time. Do NOT over-clean marble); this non-acidic toilet bowl cleaner is great. Our clients love it. Won't harm the floor around the toilet, won't harm toilet surface, smells fresh and is effective cleaner. Can purchase all from MB Stone Care online. Congrats on your new space.