Maintenance on unopened puzzle?

[Kirk2000]

If I have the puzzle apart I spray the inside of the sleeve with a little Teflon dry lubricant, you can spray the shaft too if you like, it won't harm it. As for oil, I put a drop or two of sewing machine oil into a closed Revo to get the shaft to loosen up a bit and spin more freely. It is a really thin thin oil and won't pick up much dirt and works great. KIRK