I would suggest you check your boot every 300-500mi or more. You can usually do a visual check. If it looks even slightly wet then you need to feel it for a crack. If your fingers come back greasy then you likely have your answer.So, do we all go down and have a feel around the shaft in case the rubber has split and the grease is spurting out. Carefully rubbing around the full circumference of the rubber to see if anything is loose.
A quick daily feel, if it's not too wet might help avoid any unwanted accidents
Sadly there is no way to inspect for a damaged C-Clip without removing the drive shaft. Well, if the clip failed completely you would be able to pull the shaft out of the CV, but again mine was toast but still had just enough clip that I couldn't have pulled it out.