I keep an eye on my 45mm and when I see lint building I remove the blade and wipe with a slightly oiled cloth. I have also had a problem with the "sticky" blade when I reassembled the unit. I find it difficult to determine if the blade is actually turning freely so I put a black dot on the outside of the blade with a permanent black marker. I can now check quickly by glancing at the dot to determine how smoothly it is revolving around. If I decide to turn the blade around in the cutter, I put two black dots on the outside of the blade.