Block sanding turnouts?

I bought some Bachmann “Track Cleaning Fluid” on Amazon a couple of weeks ago, and, to my amazement, it did what it was supposed to do. I had checked the reviews (which were overwhelmingly positive) and saw where one buyer mentioned “block sanding” his turnouts. I has one turnout (out of seven) that doesn’t want to “play nice” with one of my locomotives.

I am new to this, and am wondering if this is a way to “fine tune” these [pieces of equipment. I guess I am asking if this is true, and if so, what are the details on doing it? I am working with N scale, if it makes a difference.