Over the years, I’ve stocked up on my favorite 0.5 mm gel pens, colorful cotton ... to try to clean the once bright-white grout lines between my subway tiles with any sort of efficiency ...

Additionally, the grout in between the tiles on your bathroom floor ... As opposed to cleaning grout itself, this pen works similarly to White-Out, essentially sealing older soiled grout with ...

Benefits: Grout pens are super affordable ... Editor's Note: This cleaner is only for ceramic and porcelain tiles. It is way too harsh for marble and granite, so do not use it on grout lines ...