I've been putting a small fan on my work bench and pointing it directly at my blade when drawfiling. I've found that it blows all the particles off the blade between strokes. Since I've started doing this, I've found that my files don't load up as much, even though I use chalk. But, more importantly, I pretty much eliminated the "Oh Dangit Scratches" that occur when chunks get caught under the file. Anyway, just thought I'd pass it along. Take care...