I'm curious as to why the night sights on your CDP Pro were getting dim. My Pro Elite is a predecessor to the CDP, and my original night sights are as bright as the day I got it.
When cleaning, do you make sure you get any gunk off the sights?
Not sure why they got dim, but they were practically out. Yes, I take care when cleaning them but Kimber said they only last 10-12 years. Maybe some of them aren't as strong as others (?) Maybe the tritium was some faulty Russian tritium or something