Who has an expensive paper shredder (not the ALDI scrap that one puts on a trash can), should lubricate the cutting unit regularly. This increases the life and prevents paper dust before. This can either make a cruets (which may, however, be quite a mess) or with such oil-leaves. Just put the paper into the paper feed and shred leave, then activate the return 10 seconds for the oil better distributed and completed; because spills / drip anything and it's a clean business.
Unfortunately, a bit pricey but you pay for maintenance with the comfort and the brand name. I would buy the leaves again.
