What you call cleaning is removing the bees roads and bridges between frames! Your cleaning makes them detour clear to the sides and ends of the boxes to get upstairs until they can rebuild what you call dirt. Why would you want to do that? When you split the boxes, just smoke the bees off the bridge comb before putting the boxes back together so you don't crush folks. The only cleaning that needs done is loose honey and unavoidably crunched usually drone brood.