Best grout cleaner out there and its for carpet! Resolve carpet foam. Spray it on. Leave for 10 min. Scrub it off with a stiff scrub brush! Tip:as you scrub wipe the dirt that comes up off. If you don't it will just soak back in before you get back to mop it off.
You can use HYDROGEN PEROXIDE to get rid of armpit stains, to clean cookie sheets, as a miracle cleaner in your kitchen and bathroom, and to make your own “oxi clean”. This stuff is amazingly versatile!
Once a month, add a cup of Distilled White Vinegar & 1 Cup of Baking Soda directly into the drum and use HOT water for washing. Then, I add about ½ cup of vinegar into the fabric softener compartment and ½ cup of baking soda into the detergent compartment. Set the wash on “Quick Wash” with HOT water and High Spin Cycle. If the mold situation is really bad,use bleach instead of vinegar and baking soda. But make sure you run a few empty cycles just with hot water before doing a load of wash.