Denatured alcohol will clean the rollers and remove pitch/oils and other
residue.

Another trick but I don't advocate doing this unless you know what you're
doing. This was posted on one of the BB's a few months after DeWalt came
out with the 733 and some people were having problems feeding stock thru.
But if the rollers are really dirty and probably should be replaced anyway,
you may want to try this just want to extend their life for awhile.

If your planer can be powered up without the blades installed (see manual)
and not create a dangerous out of balance condition, then you may want to
try running a full sheet of 180 grit (or better) thru it attached to a
carrier board with spray on adhesive. Lower the carriage until it just
makes contact with the sandpaper on the carrier - then raise it until the
rollers are not touching the sandpaper.

Position the carrier under the rollers so the sandpaper sheet spans both
rollers. Hold on to the carrier firmly, apply power and s-l-o-w-l-y lower
the carriage just until you feel the rollers *just* starting to pull on the
carrier. Use both hands on the carrier now and slowly move the carrier back
and forth an inch or two and side to side (evenly) to scuff both rollers
slightly. You should be able to pull the carrier towards you without much
effort but it does require a firm grip on the carrier board. A 2' length of
11" wide 3/4"thick MDF works nicely - nice and flat and long enough to work
with comfortably.

Avoid putting alcohol directly on the sandpaper with the idea that you'll
clean and scuff at the same time. The blade carrier is spinning like crazy
and it will spray the alcohol all over......

Now if you do this with a light touch you will leave a nice freshly scuffed
surface on the rollers that is even all the way across. If you lower the
carriage to far and it pulls the carrier out of your hand - let it go rather
than trying to stop it. You may cause the roller to get a worn spot. A
light touch is needed, you just want to scuff and clean the rollers - not
wear them down.

Note that some planers have a safety mechanism that will not allow the paner
to work when a blade is removed. I wouldn't advise trying to defeat the
safety device - it's telling you that you cannot power that up without
creating a dangerous situation.

After you're done, clean the rollers with denatured alcohol and re-install
the blades as per the manual.

One last note. Check what the manf states as to use for cleaning the
rollers with. DeWalt advises denatured alcohol (on the 733 anyway) and I
don't know what others may recommend.

Bob S.