Another tip I've read for sharpening pencils with the Prismacolor sharpener is to occasionally sharpen a graphite pencil too... the graphite helps keep the colored pencils from 'catching' on the blade. I think sometimes the fault is more in splintery wood than in the leads. Also with the Prismacolor sharpener - pencils seem to catch more when there is a build up of shavings caught in the cap between the casing and the blade, so keep that well cleaned out, too.
Dina Kowal Creative ♥ Original Art Prints
If you hear a voice within you say you cannot paint,
then by all means paint, and that voice will be silenced.
Vincent Van Gogh