07-23-2015, 03:58 AM
One of the oldest method which I usually prefer to use is mixing 3/4 C baking soda with 1/4 C bleach make it a thick paste and apply on the grouts and leave it for 5-10 minutes .After that scrub it with tooth brush .I have got some nice stuff of tiles & stones which I am going to apply in my bathroom after some months .