Only cleans a fraction of what it finds

CCleaner works fine,but I have a question: When it finishes it's analysis,CCleaner says there are several hundred Megs of stuff that can be removed.However,when you run the cleaner,only a fraction of that amount is removed.Why? :unsure:

It's a good idea to give a bit of info such as your operating system and version of ccleaner used :)

Are you a new user or has this just started?

What 'stuff ' is it not cleaning?

Are you making sure your browser is closed before you clean?

Check the second option under Options > Advanced

It's a good idea to give a bit of info such as your operating system and version of ccleaner used :)

Are you a new user or has this just started?

What 'stuff ' is it not cleaning?

Are you making sure your browser is closed before you clean?

Sorry,I am using XP Home and the CCleaner Ver 2.33.1184

I have been using CCLeaner for about a year now. The program prompts you to close browsers if you haven't done so.

Under options-advanced is 'only delete windows temp folders older than 24 hours' ticked?

What items is it not cleaning?