@makcikalertsg: Finally decided on @groutprotech (IG) to change my 2 toilets nya grout. Not tiles just grout. Tiles bagus lagi. I also like that they hv their own full time workers bukan pakai 3rd party nya. And the fact that they started out with the not so good grouts (smua drg tunjuk kat sana very transparent, i like) and have grown n improvised to using the best. They have 2 yrs warranty . Can't wait to share the results! one of the telltale signs of grout failure is when your grout has holes, or is cracked and breaking down. When the grout is deteriorating, this can cause your tiles to become loose or come off entirely. Another indication of grout failure is any sign of mold or mildew. Meantime u all can check out www.groutprotech.com