very large amount of "junk" cleaned

When C Cleaner scanned my windows PC I get the summary that there is 785 MB of junk that can be cleaned. After I have C Cleaner clean that junk, the end result is that there was over

28 GB of junk cleaned. Why the discrepancy and is that something normal?

Have you anything stuck in you recycle bin?

Nothing stuck in thr recycle bin.

Windows can sometimes think that there are stil files in the bin even though they have been removed and you can't see anything there.

When that happens then what Windows thinks is in the bin just keeps growing and growing.

Do the following just in case that is the issue here:

https://community.ccleaner.com/topic/60979-empty-recycle-bin-skipped-files/?tab=comments#comment-331053