Replying to Help on Summer setup Ruining Edges?

I have a pair of brand new k2 sights (because I busted my old volkls this past season). And as you probably know from the title of this thread, my metal rail that I use to practice on in the summer is bumping my edges a little. What can I do to prevent this from happening and/or prolong the life of my ski? Also, I haven't really detuned my underfoot edges so might that be doing something detrimental to my edges? One last thing, the rail also has some kinda black sh*t on it that's scraping off so how can I clean this rail?
I really appreciate all the answers! +K