I normally dodge and burn my prints, but I have the feeling that when doing so will not improve the print as I want it to.

For instance, if I burn the print, if I use the same filter, the whitness will be more gray on that area (since it will get more light).

I'm wondering how you do it. Do you just dodge/burn and don't care if the whitness gets affected? Or do you change to (if we go back to the burn-example) a higher filter so the burn only affects the dark areas?
Or do you locally change the contrast?

/ Marcus