Makes sure the tiles are tiling right, it really needs a seamless texture that tiles better than this one. It doesn't have to tile perfectly straight, but this looks a bit funny now.

Also, while I generally like the effect of wet tiles like this, it's shininess looks odd because the white is too sharp, it should somehow be a little bit softer.

Finally one question, did you apply this to a model or to a block surface?

Cheers