Well I tried to play with my prismas today and it seemed to take me an our just to colour two pictures. I also noticed that when using pale colours like yellow and peach, grey comes from the smudger (forgotten it's name) and makes a nasty grey smudge. What am I doing wrong? Getting rather tempted to ditch them and try the promarkers but I want to give them a decent shot before I give in so any help would be appreciated. Thank you.