"A personal ridiculous experience with CCleaner"

Although my memory is not entirely precise, I have been using CCleaner for nearly ten years. Throughout that time, I have trusted this program to protect the personal information on my computer. However, recently my trust has come into question. This is because I used a feature provided by another program, which made me realize what I believe to be a flaw in CCleaner.

The Glary Utilities program includes two features: Track Eraser and Disk Cleaner. After first cleaning my computer’s junk files with CCleaner, I ran these two features and was surprised to find over 4,000 records that had not been removed by CCleaner. This discovery was quite shocking to me. Since then, I have been running CCleaner alongside Track Eraser and Disk Cleaner. Could it be that these functions are significantly more effective than CCleaner’s?

I have regarded CCleaner as my computer’s trusted friend for security for 20 years.
However, I want to express how my trust has recently been shaken after using other programs.
I always check all the items in CCleaner before cleaning.
But after completing all the cleaning, when I use two functions included in Glary Utilities,
I find dozens of megabytes of files that were not cleaned, and sometimes as many as 4,000 uncleaned files are discovered.
These two functions are Disk Cleaner and Track Eraser.
I hope that CCleaner will clean everything so thoroughly that these two functions have nothing left to clean.

Different cleaners target/clean different things.

It depends on what the particular cleaner’s developers regard as important to remove and what not.

So the ones that remove ‘the most’ are often removing things that don’t need to be removed, simply to boast that they remove more than their competitors.