Hi Houzz, redid a shower about 1.5 years ago and a couple days ago I noticed the bottom 2-3 rows of tile all the way around are darker as if they’ve absorbed moisture. Has anyone experienced anything like this? These tiles are Carrara marble and have been sealed. I’ve read some posts about moisture not evaporating through the face of sealed tiles, but my concern is that it’s only at the bottom, at the level where the hot mop ends basically… and that it is not just isolated to a random spot, it’s all the way around. any ideas? Thank you!