What do you use to clean cork?(light sanding or chemical) How do most of you get a straight edge on shrink grips, I was thinking of getting a straight edge paper cutter.

Light soap! with plenty of water ! If need more than that, get a "Stiff Brush".
Hope this Helps.

A SOS pad will work too but the best is to put grip under warm water and rub then let the rod handle dry over night. Or you can use a green scub pad with L.O.C. works great too.
Hope this was helpful,
Neal Cissel
w/Neal's Fishing Products

Try using Simple Green. It's a bio-degradable spray cleaner that's available in the automotive department of Wal-Mart. Spray it on, scrub with a soft brush (I use a brush made to clean fingernails), rinse, and let it dry. The cork will look like new.