While shopping at the local Hancock's store I picked up a free pamphlet put out by Olfa on their cutting tools and mats. In the back there is a page on the "Care, Cleaning & Blade Replacement".
"Cleaning
"To maximize longevity of your rotary blade, periodically remove the blade and carefully wipe the lint and residue from both the OLFA cutter and blade. Put one drop of sewing machine oil around the center of the blade before reassembling the cutter."
There you have it. Sewing machine oil. We all have some!
May your cutters all be free-wheeling!
Happy cutting!!!