Don't feel bad. I have to do the same thing. There's nothing else for it, I'm afraid. I actually had a pedicurist once ask me if I were a diabetic, my calluses were so thick. Which I'm not. I guess diabetics have problems with calluses and/or dry & cracked feet?

There's this gel you can buy in Wal-Mart in the Pharmacy section that's usually right around other diabetic supplies, in a little blue bottle. You slather the gel on your feet, leave it on for a minute, and then wipe it off. Usually a good layer of dead skin comes off along with. Wonderful stuff. I have to use it several times in one sitting, but it does make callus-removing easier.