I bought a number of deadblow hammers from MAC about 20-25 years ago. They were good as hammers but probably 10-15 years old the plastic handles starting cracking and also became sticky. I returned them to MAC for a full replacement and some of the new were MAC and others were labeled Stanley. Now, another 10 or so years later some have started doing the same thing. Anyone know what's going on? As a side question, do Snap On deadblow hammers ever do this? Thanks, Tom