Stuck together rotary blades
 

I had given my Mom some rotary blades years ago - and I went to open the packages some 20 years later.

The blades were stuck together and did not want to come apart.

I put them in boiling water for a few minutes and was able to get them to come apart. I put a thin coat of oil on them to prevent them from rusting.

Be careful getting them out.

They likely have a thin coating of machine oil on them to keep them from rusting. Sometimes just a little gentle heat, like a hair dryer or even warming them in your hands, will help unstick them. That's what I do with my stash of blades of roughly the same age.

I cleaned out some drawers in my quilting room and found 4 packages of different size rotary blades that were probably close to 15 years old or more and never opened. They too were frozen together as the oil had dried. DH took them apart (he was a tool and die guy, so had the correct tools to not mar the blades) cleaned all the dried hardened oil off of them and then he put a coating of sewing machine oil on them. Good as new.