This was basically me two years ago. Buy a diamond file from a ski shop or online and a gummi stone. Use both of them at a 45 degree angle on the underfoot region of your edge. Don't worry about applying too much pressure or anything, you want to actually apply a good amount of force against your edge or else it won't make much of a difference from it not being detuned. Just apply a lot more force than you think, brcause when i first detuned my edge i didnt use that much force and i always thought that if i did i would some how ruin them. Hope this helps.