hope ive got that right, smudge stumps.
sometimes u want to use a smudge stump and the tip is 2 hard and wont blend ur colors.
what i do is take a piece of sandpaper, wich i also use to clean the tip of my smudge stump. Itll make ur tip softer and easier to blend ur colors.

not sure if this is posted somewhere on this forum before, but i couldnt find it.
if so, i wont be affended if this post is deleted.